chore(ci): pin node-version to align with the other workflows (#6934)

Author: Anemy

.github/workflows/test-installers.yml

@@ -176,7 +176,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 22
+          node-version: 22.15.1
           cache: 'npm'
 
       - name: Run post-checkout command