Update create-pull-request action version

Author: shenxianpeng

.github/workflows/used-by.yml

@@ -21,7 +21,7 @@ jobs:
           update-badge: 'true'
 
       - name: Create Pull Request
-        uses: peter-evans/create-pull-request@v8
+        uses: peter-evans/create-pull-request@5f6978faf089d4d20b00c7766989d076bb2fc7f1 # v8.1.1
         with:
           add-paths: "README.md" # the file path to commit
           commit-message: "chore: update used-by badge by github-actions[bot]"