docs: Add correct implementation description

Author: nicovitt

README.md

@@ -15,7 +15,7 @@ Example:
 const init = async () => {
   console.log("Init LDAP Plugin.");
 
-  const initLDAP = require("@openinc/parse-server-ldap");
+  const { init: initLDAP } = require("@openinc/parse-server-ldap");
   initLDAP(Parse);
 };