chore: update name

Author: avneesh0612

package.json

@@ -3,7 +3,7 @@
   "displayName": "Next.js and React Snippets",
   "description": "This is an extension for Next.js and React Snippets with ts support as well!",
   "version": "1.0.0",
-  "publisher": "AvneeshAgarwal",
+  "publisher": "ReactandNextjsSnippets",
   "icon": "logo.png",
   "repository": {
     "url": "https://github.com/avneesh0612/react-nextjs-snippets"