Increase timeout for retry step in test workflow

Author: wtetsu

.github/workflows/test.yml

@@ -27,7 +27,7 @@ jobs:
         if: matrix.os != 'ubuntu-latest'
         uses: nick-fields/retry@v2
         with:
-          timeout_minutes: 10
+          timeout_minutes: 30
           max_attempts: 30
           command: go test -v ./pkg/...
       - name: Test with coverage