fix: correct Sentry server auth type from api_key to oauth

The Sentry MCP server uses OAuth authentication, not API key.
This caused the desktop app to skip showing the Connect button.

Signed-off-by: Myko <myko@mcpmux.com>
Signed-off-by: Mohammod Al Amin Ashik <maa.ashik00@gmail.com>

Author: its-mash

servers/com.sentry-mcp.json

@@ -18,7 +18,7 @@
   },
 
   "auth": {
-    "type": "api_key",
+    "type": "oauth",
     "instructions": "Authenticate via the Sentry MCP endpoint using your Sentry account"
   },