ci: add/update workflow for autosquash on PRs

Author: wetransformer

.github/workflows/tf-autosquash.yml

@@ -23,7 +23,7 @@ jobs:
         env:
           WE_HELPER_GITHUB_PRIVATE_KEY: ${{ secrets.WE_HELPER_GITHUB_PRIVATE_KEY }}
         if: env.WE_HELPER_GITHUB_PRIVATE_KEY # only if we have the required secret
-        uses: actions/create-github-app-token@67018539274d69449ef7c02e8e71183d1719ab42 # v2.1.4
+        uses: actions/create-github-app-token@7e473efe3cb98aa54f8d4bac15400b15fad77d94 # v2.2.0
         id: app-token
         with:
           app-id: ${{ secrets.WE_HELPER_GITHUB_APP_ID }}