fix: update @modelcontextprotocol/sdk to 1.20.0 for 2025-06-18 protocol support

Updates the MCP SDK from version 1.12.0 to 1.20.0 to add support for protocol
version 2025-06-18. This resolves the "Server protocol version is not supported"
error when connecting to MCP servers using the newer protocol.

Fixes #8683

Author: roomote

pnpm-lock.yaml

@@ -456,7 +456,7 @@
 		"@google/genai": "^1.0.0",
 		"@lmstudio/sdk": "^1.1.1",
 		"@mistralai/mistralai": "^1.9.18",
-		"@modelcontextprotocol/sdk": "1.12.0",
+		"@modelcontextprotocol/sdk": "1.20.0",
 		"@qdrant/js-client-rest": "^1.14.0",
 		"@roo-code/cloud": "workspace:^",
 		"@roo-code/ipc": "workspace:^",