ci: disallow non-maintainer changes to Yarn files (#49192)

Co-authored-by: trop[bot] <37223003+trop[bot]@users.noreply.github.com>
Co-authored-by: David Sanders <dsanders11@ucsbalum.com>

.github/workflows/non-maintainer-dependency-change.yml

@@ -7,6 +7,8 @@ on:
       - 'spec/yarn.lock'
       - '.github/workflows/**'
       - '.github/actions/**'
+      - '.yarn/**'
+      - '.yarnrc.yml'
 
 permissions: {}