Bump tibdex/github-app-token from 1 to 2

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] <support@github.com>

.github/workflows/build-docker-images.yml

@@ -16,7 +16,7 @@ jobs:
 
         - name: Get Token
           id: get_workflow_token
-          uses: tibdex/github-app-token@v1
+          uses: tibdex/github-app-token@v2
           with:
             private_key: ${{ secrets.ICUB_TECH_IIT_APP_KEY }}
             app_id: ${{ secrets.ICUB_TECH_IIT_APP_ID }}