Merge pull request #2772 from amnonh/join_sl_table

types.json: fix join in the SL table

Author: amnonh

grafana/types.json

@@ -3792,7 +3792,7 @@
               "id": "joinByField",
               "options": {
                 "byField": "group",
-                "mode": "outer"
+                "mode": "outerTabular"
               }
             },
             {