Don't run CI on PRs that only update translations

Author: dibarbet

azure-pipelines.yml

@@ -21,6 +21,7 @@ pr:
     - .github/*
     - azure-pipelines/release.yml
     - CHANGELOG.
+    - 'l10n/bundle.l10n.*.json'
 
 # Run a scheduled build every night on main to run tests against insiders VSCode.
 # The variable testVSCodeVersion is set to insiders based on the build reason.