Update API discovery name

Author: handotdev

discovery-openapi.json

@@ -1,7 +1,7 @@
 {
   "openapi": "3.0.1",
   "info": {
-    "title": "Mintlify Discovery API",
+    "title": "Mintlify Assistant API",
     "description": "An API to integrate Mintlify discovery features into your product.",
     "version": "1.0.0"
   },
@@ -21,7 +21,7 @@
         "x-mcp": {
           "enabled": true
         },
-        "summary": "Generate assistant message",
+        "summary": "Assistant message",
         "description": "Generates a response message from the assistant for the specified domain.",
         "parameters": [
           {