Fix GitHub release permissions

- Add GITHUB_TOKEN environment variable to release job
- This should resolve the 'Resource not accessible by integration' error
- Required for creating releases from GitHub Actions

Author: Goopil

.github/workflows/release.yml

@@ -155,3 +155,5 @@ jobs:
             aggregated-artifacts/**/*.sha256
             aggregated-artifacts/SHA256SUMS
           generate_release_notes: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}