fix: address npm auto-corrected errors in package.json

Ran "npm pkg fix" to resolve warnings where npm had auto-corrected some fields during publish.

Author: elvismdev

package.json

@@ -4,7 +4,7 @@
   "description": "A CLI tool to manage code2prompt file size limits",
   "main": "index.js",
   "bin": {
-    "code2prompt-manager": "./index.js"
+    "code2prompt-manager": "index.js"
   },
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"