docs: replacing nightwatch CLI options URL with proper documentation (#4364)

(cherry picked from commit fd4573a)

Author: aberonni

packages/@vue/cli-plugin-e2e-nightwatch/README.md

@@ -20,7 +20,7 @@
 
   > Note: this plugin currently uses Nightwatch v0.9.x. We are waiting for Nightwatch 1.0 to stabilize before upgrading.
 
-  Additionally, [all Nightwatch CLI options are also supported](https://github.com/nightwatchjs/nightwatch/blob/master/lib/runner/cli/cli.js).
+  Additionally, [all Nightwatch CLI options are also supported](https://nightwatchjs.org/guide#command-line-options).
 
 ## Configuration
 

packages/@vue/cli-plugin-e2e-nightwatch/index.js

@@ -11,7 +11,7 @@ module.exports = (api, options) => {
     },
     details:
       `All Nightwatch CLI options are also supported.\n` +
-      `https://github.com/nightwatchjs/nightwatch/blob/master/lib/runner/cli/cli.js`
+      `https://nightwatchjs.org/guide#command-line-options`
   }, (args, rawArgs) => {
     removeArg(rawArgs, 'url')
     removeArg(rawArgs, 'mode')