Bump actions/create-github-app-token from 1 to 2

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

---
updated-dependencies:
- dependency-name: actions/create-github-app-token
  dependency-version: '2'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/update-vendor-hash.yml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ github.actor == 'dependabot[bot]' }}
     steps:
-      - uses: actions/create-github-app-token@v1
+      - uses: actions/create-github-app-token@v2
         id: app-token
         with:
           app-id: ${{ vars.CI_APP_ID }}

.github/workflows/upgrade-flakes.yml

@@ -15,7 +15,7 @@ jobs:
         with:
           extra_nix_config: |
             access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
-      - uses: actions/create-github-app-token@v1
+      - uses: actions/create-github-app-token@v2
         id: app-token
         with:
           app-id: ${{ vars.CI_APP_ID }}