Update jsonpath.md

Adding note that JSONPath in kubectl cli does not currently support RegEx.

content/en/docs/reference/kubectl/jsonpath.md

@@ -98,4 +98,24 @@ kubectl get pods -o=jsonpath="{range .items[*]}{.metadata.name}{\"\t\"}{.status.
 ```
 {{< /note >}}
 
+{{< note >}}
+
+JSONPath RegEx are currently not supported. You must use jq or similar.
+Example currently not supported
+
+```shell
+kubectl get secrets -o jsonpath='{.items[?(@.metadata.name=~/^test$/)].metadata.name}'
+```
+{{< /note >}}
+
+{{< note >}}
+
+JSONPath RegEx are currently not supported. You must use jq or similar.
+Example currently not supported
+
+```shell
+kubectl get secrets -o jsonpath='{.items[?(@.metadata.name=~/^test$/)].metadata.name}'
+```
+{{< /note >}}
+