Workflow: Pin setupgo version

Author: lamATnginx

.github/workflows/playwright.yml

@@ -43,7 +43,7 @@ jobs:
             with:
                 hugo-version: '0.147.8'
                 extended: true
-          - uses: actions/setup-go@v6
+          - uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 #v6.0.0
             with: 
               go-version: '1.24.6'
           - name: Install dependencies