Bump tibdex/github-app-token from 1 to 2 (#771)

Bumps [tibdex/github-app-token](https://github.com/tibdex/github-app-token) from 1 to 2.
- [Release notes](https://github.com/tibdex/github-app-token/releases)
- [Commits](tibdex/github-app-token@v1...v2)

---
updated-dependencies:
- dependency-name: tibdex/github-app-token
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/update-generated-files.yml

@@ -8,7 +8,7 @@ jobs:
     name: generate files
     runs-on: ubuntu-latest
     steps:
-    - uses: tibdex/github-app-token@v1
+    - uses: tibdex/github-app-token@v2
       id: generate-token
       with:
         app_id: ${{ secrets.AUTOMATION_APP_ID }}