docs: suggest correct bin entry (#7518)

Our existing example present in npm doc was giving warning, so just
modified that so that we will not get any warning .

Closes: #7302

docs/lib/content/configuring-npm/package-json.md

@@ -368,7 +368,7 @@ For example, myapp could have this:
 ```json
 {
   "bin": {
-    "myapp": "./cli.js"
+    "myapp": "bin/cli.js"
   }
 }
 ```