CI: fix Colima startup failure on macOS runners

The VZ (Virtualization.framework) driver was failing to start on
GitHub Actions macOS runners with disk mounting errors. Switch to
the QEMU driver which is more reliable in CI environments, with
explicit resource limits to ensure consistent behavior.

Author: dannywillems

.github/workflows/test-docs-scripts-node-operators.yaml

@@ -25,7 +25,7 @@ jobs:
         run: |
           brew install docker
           brew install colima
-          colima start
+          colima start --driver qemu --cpu 2 --memory 4
 
       - name: Test build-info-docker script
         run: |