docs: Add a note about previously installed server installations (ChromeDevTools#982)

Author: natorion

README.md

@@ -132,6 +132,9 @@ claude mcp add chrome-devtools --scope user npx chrome-devtools-mcp@latest
 
 **Install as a Plugin (MCP + Skills)**
 
+> [!NOTE]  
+> If you already had Chrome DevTools MCP installed previously for Claude Code, make sure to remove it first from your installation and configuration files.
+
 To install Chrome DevTools MCP with skills, add the marketplace registry in Claude Code:
 
 ```sh