Fix typo in vue/require-typed-ref message (#2219)

Author: FloEdelmann

lib/rules/require-typed-ref.js

@@ -33,7 +33,7 @@ module.exports = {
     fixable: null,
     messages: {
       noType:
-        'Specify type parameter for `{{name}}` function, otherwise created variable will not by typechecked.'
+        'Specify type parameter for `{{name}}` function, otherwise created variable will not be typechecked.'
     },
     schema: []
   },