docs: remove rocket chat badge

The talk.owncloud.com Rocket.Chat server is going to be discontinued.
This removes all mentions of that server to stop directing users there.

CONTRIBUTING.md

@@ -38,7 +38,7 @@ For simplicity reasons, this document mostly refers to the ownCloud [Infinite Sc
 
 For general questions, please refer to [ownCloud's FAQs](https://owncloud.com/faq/) or ask on the [ownCloud Central Server](https://central.owncloud.org/).
 
-We also have a [Rocket Chat Server](https://talk.owncloud.com/channel/ocis) to answer your questions specifically about ownCloud Infinite Scale.
+We also have a [Matrix channel](https://matrix.to/#/#ocis:matrix.org) to answer your questions specifically about ownCloud Infinite Scale.
 
 ## What should I know before I get started
 

README.md

@@ -1,7 +1,6 @@
 # ownCloud Infinite Scale
 
 [![Matrix](https://img.shields.io/matrix/ocis%3Amatrix.org?logo=matrix)](https://app.element.io/#/room/#ocis:matrix.org)
-[![Rocket chat](https://img.shields.io/badge/Chat%20on%20Rocket.Chat-blue?logo=data:image/png;base64,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)](https://talk.owncloud.com/channel/infinitescale)
 [![Build Status](https://drone.owncloud.com/api/badges/owncloud/ocis/status.svg)](https://drone.owncloud.com/owncloud/ocis)
 [![Security Rating](https://sonarcloud.io/api/project_badges/measure?project=owncloud_ocis&metric=security_rating)](https://sonarcloud.io/dashboard?id=owncloud_ocis)
 [![Coverage](https://sonarcloud.io/api/project_badges/measure?project=owncloud_ocis&metric=coverage)](https://sonarcloud.io/dashboard?id=owncloud_ocis)
@@ -11,23 +10,25 @@
 [![oCIS docker image](https://img.shields.io/docker/v/owncloud/ocis?label=oCIS%20docker%20image&logo=docker&sort=semver)](https://hub.docker.com/r/owncloud/ocis)
 [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
 
-*   [Introduction](#introduction)
-*   [Quickstart](#quickstart)
-*   [Overview](#overview)
-    * [Clients](#clients)
-    * [Web Office Applications](#web-office-applications)
-    * [Authentication](#authentication)
-    * [Installation](#installation)
-*   [Important Readings](#important-readings)
-*   [Run ownCloud Infinite Scale](#run-owncloud-infinite-scale)
-    * [Use the Official Documentation](#use-the-official-documentation)
-    * [Use the ocis Repo as Source](#use-the-ocis-repo-as-source)
-*   [Documentation](#documentation)
-    * [Admin Documentation](#admin-documentation)
-    * [Development Documentation](#development-documentation)
-*   [Security](#security)
-*   [Contributing](#contributing)
-*   [Copyright](#copyright)
+- [ownCloud Infinite Scale](#owncloud-infinite-scale)
+  - [Introduction](#introduction)
+  - [Quickstart](#quickstart)
+  - [Overview](#overview)
+    - [Clients](#clients)
+    - [Web Office Applications](#web-office-applications)
+    - [Authentication](#authentication)
+    - [Installation](#installation)
+  - [Important Readings](#important-readings)
+  - [Run ownCloud Infinite Scale](#run-owncloud-infinite-scale)
+    - [Use the Official Documentation](#use-the-official-documentation)
+    - [Use the ocis Repo as Source](#use-the-ocis-repo-as-source)
+  - [Documentation](#documentation)
+    - [Admin Documentation](#admin-documentation)
+    - [Development Documentation](#development-documentation)
+  - [Security](#security)
+  - [Contributing](#contributing)
+  - [End User License Agreement](#end-user-license-agreement)
+  - [Copyright](#copyright)
 
 ## Introduction
 
@@ -131,7 +132,7 @@ make -C ocis build
 # run with demo users
 IDM_CREATE_DEMO_USERS=true ./ocis/bin/ocis server
 
-# Open your browser on http://localhost:9200 to access the bundled web-ui 
+# Open your browser on http://localhost:9200 to access the bundled web-ui
 ```
 
 All batteries included: no external database, no external IDP needed!
@@ -151,7 +152,7 @@ If you find a security issue, please contact [security@owncloud.com](mailto:secu
 
 ## Contributing
 
-We are _very_ happy that oCIS does not require a Contributor License Agreement (CLA) as it is [Apache 2.0 licensed](LICENSE). We hope this will make it easier to contribute code. If you want to get in touch, most of the developers hang out in our [matrix channel](https://app.element.io/#/room/#ocis:matrix.org), our [rocket chat channel](https://talk.owncloud.com/channel/infinitescale) or reach out to the [ownCloud central forum](https://central.owncloud.org/).
+We are _very_ happy that oCIS does not require a Contributor License Agreement (CLA) as it is [Apache 2.0 licensed](LICENSE). We hope this will make it easier to contribute code. If you want to get in touch, most of the developers hang out in our [matrix channel](https://app.element.io/#/room/#ocis:matrix.org) or reach out to the [ownCloud central forum](https://central.owncloud.org/).
 
 Infinite Scale is carefully internationalized so that everyone, no matter what language they speak, has a great experience. To achieve this, we rely on the help of volunteer translators. If you want to help, you can find the projects behind the following links:
  [Transifex for ownCloud web](https://app.transifex.com/owncloud-org/owncloud-web/translate/) and [Transifex for ownCloud](https://app.transifex.com/owncloud-org/owncloud/translate/) (Select the resource by filtering for `ocis-`).