docs: refine changelog gate documentation formatting and descriptions

README.md

@@ -176,13 +176,14 @@ Enable changelog validation to enforce that code changes include `Unreleased` ch
     badge-url: ${{ steps.coverage.outputs.badge-url }}
     enable-changelog-gate: true
     changelog-gate-mode: strict
-    changelog-gate-required-for: 'code,behavior,security,workflow,tooling'
+    changelog-gate-required-for: "code,behavior,security,workflow,tooling"
     changelog-gate-allow-docs-only: true
-    changelog-gate-docs-globs: 'docs/**,**.md,**.txt,**.rst'
-    changelog-gate-skip-labels: 'skip-changelog'
+    changelog-gate-docs-globs: "docs/**,**.md,**.txt,**.rst"
+    changelog-gate-skip-labels: "skip-changelog"
 ```
 
 The gate automatically:
+
 - Parses diffs to detect docs-only PRs (skips requirement for doc-only changes)
 - Counts `Unreleased` additions using section-aware parsing (ignores edits outside the section)
 - Checks PR labels for skip exemptions (for example, `skip-changelog`)