fix: pin version of LocalStack

Author: lakkeger

.github/workflows/test_cloudpods.yml

@@ -57,7 +57,7 @@ jobs:
       - name: Start LocalStack
         uses: LocalStack/setup-localstack@v0.2.0
         with:
-          image-tag: ${{ matrix.tag }}
+          image-tag: '3.4.0'
           use-pro: 'true'
           install-awslocal: 'true'
         env: