updated the metadata file

Author: scmacdon

.doc_gen/metadata/neptune_metadata.yaml

@@ -171,7 +171,7 @@ neptune_DeleteDBCluster:
           excerpts:
             - description:
               snippet_tags:
-                - neptune.Kotlin.delete.cluster.main
+                - neptune.kotlin.delete.cluster.main
     Python:
       versions:
         - sdk_version: 3