Update Homebrew setup action to use main branch (#3435)

Author: castrojo

.github/workflows/validate-brewfiles.yml

@@ -14,7 +14,7 @@ jobs:
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
 
       - name: Set up Homebrew
-        uses: Homebrew/actions/setup-homebrew@v3
+        uses: Homebrew/actions/setup-homebrew@main
 
       - name: Validate Brewfiles
         shell: bash