ci: add/update workflow for autosquash on PRs

Author: wetransformer

.github/workflows/tf-autosquash.yml

@@ -24,7 +24,7 @@ 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@29824e69f54612133e76f7eaac726eef6c875baf # v2.2.1
+        uses: actions/create-github-app-token@fee1f7d63c2ff003460e3d139729b119787bc349 # v2.2.2
         id: app-token
         with:
           app-id: ${{ secrets.WE_HELPER_GITHUB_APP_ID }}