add ci step to automatically update tag & revision of a specified formula and open a PR to Homebrew repo (#808)

Author: umbynos

.github/workflows/release.yaml

@@ -140,3 +140,9 @@ jobs:
           PLUGIN_BUCKET: ${{ secrets.DOWNLOADS_BUCKET }}
           AWS_ACCESS_KEY_ID: ${{ secrets.AWS_ACCESS_KEY_ID }}
           AWS_SECRET_ACCESS_KEY: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+
+      - name: Update Homebrew formula
+        uses: dawidd6/action-homebrew-bump-formula@v3
+        with:
+          token: ${{ secrets.ARDUINOBOT_GITHUB_TOKEN }}
+          formula: arduino-cli