docs: add VS Code Stable one-click install badge alongside Insiders

Author: Dev Agent Amelia

README.md

@@ -10,7 +10,7 @@ MCP server that exposes the Microsoft Dataverse Web API as **50 AI-callable tool
 
 ### One-click (VS Code)
 
-[Install in VS Code](https://insiders.vscode.dev/redirect?url=vscode-insiders%3Amcp%2Finstall%3F%257B%2522name%2522%253A%2522mcp-dataverse%2522%252C%2522command%2522%253A%2522npx%2522%252C%2522args%2522%253A%255B%2522-y%2522%252C%2522mcp-dataverse%2522%255D%257D)
+[![Install in VS Code](https://img.shields.io/badge/VS%20Code-Install-0078d4?logo=visualstudiocode)](https://vscode.dev/redirect?url=vscode%3Amcp%2Finstall%3F%257B%2522name%2522%253A%2522mcp-dataverse%2522%252C%2522command%2522%253A%2522npx%2522%252C%2522args%2522%253A%255B%2522-y%2522%252C%2522mcp-dataverse%2522%255D%257D) [![Install in VS Code Insiders](https://img.shields.io/badge/VS%20Code%20Insiders-Install-24bfa5?logo=visualstudiocode)](https://insiders.vscode.dev/redirect?url=vscode-insiders%3Amcp%2Finstall%3F%257B%2522name%2522%253A%2522mcp-dataverse%2522%252C%2522command%2522%253A%2522npx%2522%252C%2522args%2522%253A%255B%2522-y%2522%252C%2522mcp-dataverse%2522%255D%257D)
 
 ### Manual (npx)