Update README.md to remove mcp key

The vscode configuration example in the README.md does not work with my version of vscode. Since it's also not required, this change removes it so that it works in all versions of vscode.


Version:

```
Version: 1.99.1 (Universal)
Commit: 7c6fdfb0b8f2f675eb0b47f3d95eeca78962565b
Date: 2025-04-04T15:58:59.624Z (4 days ago)
Electron: 34.3.2
ElectronBuildId: 11161073
Chromium: 132.0.6834.210
Node.js: 20.18.3
V8: 13.2.152.41-electron.0
OS: Darwin x64 24.3.0
```

README.md

@@ -29,37 +29,35 @@ For manual installation, add the following JSON block to your User Settings (JSO
 
 Optionally, you can add it to a file called `.vscode/mcp.json` in your workspace. This will allow you to share the configuration with others.
 
-> Note that the `mcp` key is not needed in the `.vscode/mcp.json` file.
 
 ```json
 {
-  "mcp": {
-    "inputs": [
-      {
-        "type": "promptString",
-        "id": "github_token",
-        "description": "GitHub Personal Access Token",
-        "password": true
-      }
-    ],
-    "servers": {
-      "github": {
-        "command": "docker",
-        "args": [
-          "run",
-          "-i",
-          "--rm",
-          "-e",
-          "GITHUB_PERSONAL_ACCESS_TOKEN",
-          "ghcr.io/github/github-mcp-server"
-        ],
-        "env": {
-          "GITHUB_PERSONAL_ACCESS_TOKEN": "${input:github_token}"
-        }
+  "inputs": [
+    {
+      "type": "promptString",
+      "id": "github_token",
+      "description": "GitHub Personal Access Token",
+      "password": true
+    }
+  ],
+  "servers": {
+    "github": {
+      "command": "docker",
+      "args": [
+        "run",
+        "-i",
+        "--rm",
+        "-e",
+        "GITHUB_PERSONAL_ACCESS_TOKEN",
+        "ghcr.io/github/github-mcp-server"
+      ],
+      "env": {
+        "GITHUB_PERSONAL_ACCESS_TOKEN": "${input:github_token}"
       }
     }
   }
 }
+
 ```
 
 More about using MCP server tools in VS Code's [agent mode documentation](https://code.visualstudio.com/docs/copilot/chat/mcp-servers).