release: Only mark scheduled runs as latest nightly. (#44086)

If we make manual releases, e.g. for release candidate testing, then
they shouldn't appear on the nightly download page on servo.org, which
just displays the release that is marked as "latest".

Since the Github API documentation updated to a new API version, also
opt-in to the new version while we are at it.
There seem to be no changes affecting the usage in release.yml, but
probably the old API will be removed eventually, so why not switch to
the new version now.

See
https://docs.github.com/en/rest/releases/releases?apiVersion=2026-03-10#create-a-release

Testing: [Manual release workflow
run](https://github.com/servo/servo/actions/runs/24241705213). The
release should not be marked as latest after the run finishes.

Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>

.github/workflows/release.yml

@@ -46,7 +46,7 @@ jobs:
           TEMP_TAG=$(basename "$RELEASE_URL")
           RELEASE_ID=$( \
             gh api -H "Accept: application/vnd.github+json" \
-            -H "X-GitHub-Api-Version: 2022-11-28" \
+            -H "X-GitHub-Api-Version: 2026-03-10" \
             "/repos/${RELEASE_REPO}/releases/tags/${TEMP_TAG}" \
             | jq '.id' \
           )
@@ -67,24 +67,29 @@ jobs:
     name: Publish GH Release
     runs-on: ubuntu-latest
     steps:
-      - name: Publish as latest (success)
+      - name: Publish release (success)
         if: ${{ !contains(needs.*.result, 'failure') && (!contains(needs.*.result, 'cancelled') && !cancelled()) }}
+        env:
+          MAKE_LATEST: ${{ github.event_name == 'schedule' && 'true' || 'false' }}
         run: |
           gh api \
             --method PATCH \
             -H "Accept: application/vnd.github+json" \
-            -H "X-GitHub-Api-Version: 2022-11-28" \
+            -H "X-GitHub-Api-Version: 2026-03-10" \
             /repos/${RELEASE_REPO}/releases/${RELEASE_ID} \
-            -F draft=false
-      - name: Publish as latest (failure)
+            -F draft=false \
+            -f make_latest="${MAKE_LATEST}"
+      - name: Publish release (failure)
         if: ${{ contains(needs.*.result, 'failure') || (contains(needs.*.result, 'cancelled') || cancelled()) }}
         run: |
           gh api \
             --method PATCH \
             -H "Accept: application/vnd.github+json" \
-            -H "X-GitHub-Api-Version: 2022-11-28" \
+            -H "X-GitHub-Api-Version: 2026-03-10" \
             /repos/${RELEASE_REPO}/releases/${RELEASE_ID} \
-            -F prerelease=true -F draft=false
+            -F prerelease=true \
+            -F draft=false \
+            -f make_latest=false
     env:
       GITHUB_TOKEN: ${{ inputs.regular_release && github.token || secrets.NIGHTLY_REPO_TOKEN }}
       RELEASE_ID: ${{ needs.create-draft-release.outputs.release-id }}