Adopt proof-pr v0.2.1

Author: saagpatel

.github/workflows/proof-pr.yml

@@ -9,9 +9,10 @@ permissions:
 
 jobs:
   proof:
-    uses: saagpatel/proof-pr/.github/workflows/proof-pr-receipt.yml@v0.2.0
+    uses: saagpatel/proof-pr/.github/workflows/proof-pr-receipt.yml@v0.2.1
     with:
       receipt_path: proof-pr.json
-      proof_pr_ref: v0.2.0
+      proof_pr_ref: v0.2.1
+      check_public_git_metadata: true
       artifact_name: github-repo-auditor-proof-pr
       artifact_glob: proof-pr-artifacts/**