JSON.MGET, JSON.MSET - add warning (#496)

* JSON.MGET, JSON.MSET - add warning

* Update JSON.MSET

* Update index.md

Author: LiorKogan

content/commands/json.mget/index.md

@@ -32,6 +32,10 @@ title: JSON.MGET
 ---
 Return the values at `path` from multiple `key` arguments
 
+{{% warning %}}
+All specified keys must reside on the same [hash slot](https://redis.io/docs/latest/operate/oss_and_stack/reference/cluster-spec/#key-distribution-model).
+{{% /warning %}}
+
 [Examples](#examples)
 
 ## Required arguments

content/commands/json.mset/index.md

@@ -43,6 +43,9 @@ Set or update one or more JSON values according to the specified `key`-`path`-`v
 
 A JSON value is a hierarchical structure. If you change a value in a specific path - nested values are affected.
 
+{{% warning %}}
+All specified keys must reside on the same [hash slot](https://redis.io/docs/latest/operate/oss_and_stack/reference/cluster-spec/#key-distribution-model).
+{{% /warning %}}
 
 [Examples](#examples)