Update logging.mdx

Author: deniseschannon

vcluster/configure/vcluster-yaml/logging.mdx

@@ -66,6 +66,8 @@ Additional fields might be displayed based on context and log content.
 
 Logging is enabled in your `vcluster.yaml` configuration file. 
 
+
+
 You can enable the JSON format of log encoding.
 
 ```yaml 
@@ -80,6 +82,10 @@ logging:
   encoding: console
 ```
 
+:::note
+When changing between encoding formats, the pod will be restarted and all previous logs will be lost. 
+:::
+
 ## Config reference
 
 <Logging />