update typo snippets/ai/package.json

Co-authored-by: Anna Henningsen <github@addaleax.net>

Author: gagik

snippets/ai/package.json

@@ -2,7 +2,7 @@
   "name": "@gagik.co/snippet-ai",
   "snippetName": "ai",
   "version": "0.0.11",
-  "description": "Provides a ai command suite for mongosh to ask for MongoDB query expressions in natural language.",
+  "description": "Provides an ai command suite for mongosh to ask for MongoDB query expressions in natural language.",
   "author": "Gagik Amaryan",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",