Update docs/specification/draft/server/groups.mdx

Co-authored-by: Cliff Hall <cliff@futurescale.com>

Author: chughtapan

docs/specification/draft/server/groups.mdx

@@ -178,7 +178,7 @@ sequenceDiagram
 
     Note over Client,Server: Primitive Discovery
     Client->>Server: tools/list
-    Server-->>Client: Tools with _meta.groups
+    Server-->>Client: Tools with groups in `_meta`
 
     Note over Client: Client filters tools by group