[CI Fix] Dgl 2.3.0 workflow (#1017)

*Issue #, if available:*

*Description of changes:*


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submitJob.py

@@ -23,7 +23,7 @@
     'CI-GPU-DGL230': {
         'job_definition': 'graphstorm-definition-gpu-dgl230',
         'job_queue': 'graphstorm-queue-graphbolt',
-    }
+    },
     'CI-LINT': {
         'job_definition': 'graphstorm-definition-lint',
         'job_queue': 'graphstorm-queue-lint',