github: bump tibdex/github-app-token from 1.8.0 to 1.8.2

Bumps [tibdex/github-app-token](https://github.com/tibdex/github-app-token) from 1.8.0 to 1.8.2.
- [Release notes](https://github.com/tibdex/github-app-token/releases)
- [Commits](tibdex/github-app-token@v1.8.0...v1.8.2)

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

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

.github/workflows/flake-lock-update.yml

@@ -15,7 +15,7 @@ jobs:
         with:
           diagnostic-endpoint: ''
 
-      - uses: tibdex/github-app-token@v1.8.0
+      - uses: tibdex/github-app-token@v1.8.2
         id: generate-app-token
         with:
           app_id: ${{ secrets.APP_ID }}
@@ -39,7 +39,7 @@ jobs:
         with:
           diagnostic-endpoint: ''
 
-      - uses: tibdex/github-app-token@v1.8.0
+      - uses: tibdex/github-app-token@v1.8.2
         id: generate-app-token
         with:
           app_id: ${{ secrets.APP_ID }}