ci(.github/workflows/integration): add 'spec' to matrix command for quality checks (#243)

Co-authored-by: seungrodotlee <seungrodotlee@gmail.com>

Author: sukvvon

.github/workflows/integration.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        command: ['format', 'lint', 'type']
+        command: ['format', 'lint', 'type', 'spec']
     steps:
       - name: Checkout code
         uses: actions/checkout@v4