Bump tibdex/github-app-token from 1.7.0 to 1.8.0

Bumps [tibdex/github-app-token](https://github.com/tibdex/github-app-token) from 1.7.0 to 1.8.0.
- [Release notes](https://github.com/tibdex/github-app-token/releases)
- [Commits](tibdex/github-app-token@v1.7.0...v1.8.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/add_issues.yml

@@ -12,7 +12,7 @@ jobs:
     steps:
       - name: Generate token
         id: generate_token
-        uses: tibdex/github-app-token@v1.7.0
+        uses: tibdex/github-app-token@v1.8.0
         with:
           app_id: ${{ secrets.SYNOPS_APP_ID }}
           private_key: ${{ secrets.SYNOPS_APP_PRIVATE_KEY }}