Fix note formatting

Author: eleftherias

docs/toolhive/guides-cli/run-mcp-servers.mdx

@@ -106,7 +106,11 @@ allows you to organize your servers and manage them collectively.
 thv run --group <GROUP_NAME> <SERVER>
 ```
 
-:::note The group must exist before you can run a server in it. :::
+:::note
+
+The group must exist before you can run a server in it.
+
+:::
 
 See [Group management](./group-management.md) for more details on organizing
 servers into groups and configuring client access.