Bump tibdex/github-app-token from 1.8.0 to 1.8.1

Bumps [tibdex/github-app-token](https://github.com/tibdex/github-app-token) from 1.8.0 to 1.8.1.
- [Release notes](https://github.com/tibdex/github-app-token/releases)
- [Commits](tibdex/github-app-token@b625283...d6edb79)

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

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

.github/workflows/projectbot.yml

@@ -11,7 +11,7 @@ jobs:
     steps:
       - name: Generate token
         id: generate_token
-        uses: tibdex/github-app-token@b62528385c34dbc9f38e5f4225ac829252d1ea92
+        uses: tibdex/github-app-token@d6edb790cfa657f678d2f6188875e9837622c415
         with:
           app_id: ${{ secrets.GRAPHBOT_APP_ID }}
           private_key: ${{ secrets.GRAPHBOT_APP_PEM }}