fix(docs): trailing '`' breaks MacOS/Linux cli example for "https://modelcontextprotocol.io/quickstart/user#server-not-showing-up-in-claude-hammer-icon-missing"

Author: jsnbuchanan

quickstart/user.mdx

@@ -145,7 +145,7 @@ As needed, Claude will call the relevant tools and seek your approval before tak
 <Tabs>
 <Tab title="MacOS/Linux">
 ```bash
-npx -y @modelcontextprotocol/server-filesystem /Users/username/Desktop /Users/username/Downloads`
+npx -y @modelcontextprotocol/server-filesystem /Users/username/Desktop /Users/username/Downloads
 ```
 </Tab>
 <Tab title="Windows">