Fix stack version matrix (#5577)

Author: stevejgordon

.github/workflows/integration-jobs.yml

@@ -36,7 +36,7 @@ jobs:
            '7.9.0',
            '7.10.0',
            '7.11.0',
-           '7.12.0-SNAPSHOT',
+           '7.12.0',
            'latest-7'
         ]