Implement CD with GitHub App authentication

.github/workflows/release.yml

@@ -16,6 +16,11 @@ jobs:
     - uses: actions/setup-go@v4
       with:
         go-version: '^1.21.3'
+    - uses: tibdex/github-app-token@v2
+      id: generate_homebrew_token
+      with:
+        app_id: ${{ secrets.HOMEBREW_APP_ID }}
+        private_key: ${{ secrets.HOMEBREW_APP_PRIVKEY }}
     - name: Release via goreleaser
       uses: goreleaser/goreleaser-action@v5
       with:
@@ -23,4 +28,4 @@ jobs:
         args: release --release-notes=doc/whats_new.md
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        HOMEBREW: ${{ secrets.HOMEBREW }}
+        HOMEBREW: ${{ steps.generate_homebrew_token.outputs.token }}