Ignore unmatched files when doing git rm

Author: ericallam

.github/workflows/changesets-pr.yml

@@ -105,7 +105,7 @@ jobs:
           files=(.server-changes/*.md)
           for f in "${files[@]}"; do
             if [ "$(basename "$f")" != "README.md" ]; then
-              git rm "$f"
+              git rm --ignore-unmatch "$f"
             fi
           done