ci: improve GitHub Actions workflow with conditional checks

- Add conditional checks in GitHub Actions workflow to handle 'True' and 'False' outputs

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

.github/workflows/main.yml

@@ -644,3 +644,10 @@ jobs:
       - name: check stdout
         run: |
           echo "stdout: ${{ steps.stdout.outputs.stdout }}"
+          if echo "${{ steps.stdout.outputs.stdout }}" | grep -q "True"; then
+            echo "Output contains 'True'"
+            exit 1
+          fi
+          if echo "${{ steps.stdout.outputs.stdout }}" | grep -q "False"; then
+            echo "Output contains 'False'"
+          fi