ci: add a total timeout of 30 minutes

Author: JKRhb

.github/workflows/ci.yaml

@@ -17,6 +17,8 @@ jobs:
                 os: [macos-latest, ubuntu-latest, windows-latest]
                 node-version: [18.x, 20.x]
 
+        timeout-minutes: 30
+
         steps:
             - name: Checkout
               uses: actions/checkout@v2