docs: scope MCP server name to domain in connect examples

[devin-ai-integration]

Summary

fern-platform #12994 scopes the generated MCP server name to the site's domain (and basepath): the claude mcp add commands now emit fern_mcp_<domain><basepath> (e.g. fern_mcp_docs.ada.cx) instead of the hardcoded fern-docs.

This updates the two claude mcp add --transport http examples in mcp-server.mdx to match, using the page's example URL docs.example.com:

 claude mcp add --transport http \
-  fern-docs https://docs.example.com/_mcp/server
+  fern_mcp_docs.example.com https://docs.example.com/_mcp/server

The zh translation doesn't include these code examples, and site-level-settings.mdx only references claude mcp add generically (no server-name token), so neither required changes.

Link to Devin session: https://app.devin.ai/sessions/3304f4b0a6114c9793d3f5055ee57760

[devin-ai-integration]

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[github-actions]

🌿 Preview your docs: https://fern-preview-devin-1783617013-mcp-server-name-scope.docs.buildwithfern.com/learn

Here are the markdown pages you've updated:

• learn/docs/ai-features/mcp-server