Refactor GitHub Actions workflow for Homebrew tap updates

- Changed the trigger for the update-homebrew.yml workflow to run upon the completion of the "Build and Release" workflow on the main branch, enhancing the automation process.
- Added a conditional check to ensure the job only runs if the previous workflow concluded successfully.
- Updated comments in the script for improved clarity.

These changes streamline the workflow and improve its reliability.

.github/workflows/update-homebrew.yml

@@ -1,11 +1,16 @@
 name: Update Homebrew Tap
 
 on:
-  release:
-    types: [published]
+  workflow_run:
+    workflows: ["Build and Release"]
+    types:
+      - completed
+    branches:
+      - main
 
 jobs:
   update-tap:
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
     runs-on: macos-latest
     steps:
       - name: Checkout tap
@@ -40,7 +45,7 @@ jobs:
           fi
           echo "sha256=$SHA256" >> $GITHUB_OUTPUT
           
-          # ���出信息用于调试
+          # 输出信息用于调试
           echo "Version: $VERSION"
           echo "SHA256: $SHA256"