Fixes implmentation

Signed-off-by: Darshit Chanpura <dchanp@amazon.com>

Author: DarshitChanpura

common/src/main/java/org/opensearch/ml/common/MLModelGroup.java

@@ -237,6 +237,11 @@ public static MLModelGroup fromStream(StreamInput in) throws IOException {
         return new MLModelGroup(in);
     }
 
+    @Override
+    public String getShareableResourceName() {
+        return "ml_model_group";
+    }
+
     @Override
     public String getWriteableName() {
         return "ml_model_group";