Meta: Tweak .clang-format to allow single-line arrays in JSON

This is consistent with prettier behavior, and at least for annex-h.json
(also in the PR containing this commit) much easier to read.

.clang-format

@@ -31,4 +31,8 @@ ObjCBreakBeforeNestedBlockParam: true
 ObjCSpaceAfterProperty: true
 ObjCSpaceBeforeProtocolList: true
 
+---
+Language: Json
+BreakArrays: false
+
 ...