Fix code sample highlighting (#1033)

* fix code sample highlighting

* update sample highlighting

Author: ethanpalm

api-playground/openapi-setup.mdx

@@ -208,7 +208,7 @@ Selectively expose endpoints as Model Context Protocol (MCP) tools by using `x-m
 </ResponseField>
 
 <CodeGroup>
-```json Selective enablement {6-10, 21} wrap
+```json Selective enablement {6-9} wrap
 {
   "paths": {
     "/users": {
@@ -233,7 +233,7 @@ Selectively expose endpoints as Model Context Protocol (MCP) tools by using `x-m
 }
 ```
 
-```json Global enablement {3-5, 9-12} wrap
+```json Global enablement {3-5, 9-13} wrap
 {
   "openapi": "3.1.0",
   "x-mcp": {
@@ -368,7 +368,7 @@ Any page entry matching the format `METHOD /path` will generate an API page for
 
 OpenAPI specifications are inherited down the navigation hierarchy. Child navigation elements inherit their parent's OpenAPI specification unless they define their own:
 
-```json {5, 12-13, 18, 20-21}
+```json {3, 7-8, 11, 13-14}
 {
   "group": "API reference",
   "openapi": "/path/to/openapi-v1.json",
@@ -386,7 +386,7 @@ OpenAPI specifications are inherited down the navigation hierarchy. Child naviga
       ]
     }
   ]
-},
+}
 ```
 
 #### Individual endpoints