Add in fix to use relative paths for Gemfile.local.example, thereby fixing review comments

Author: gwillcox-r7

Gemfile.local.example

@@ -31,5 +31,5 @@ group :local do
   gem 'lab', '~> 0.2.7'
   # And this is another way that references local directories to find and compile the gem file as needed.
   # This is the optimal method for testing Gem PRs such as those in rex-text or rex-powershell.
-  gem 'rex-powershell', path: '/home/gwillcox-r7/git/rex-powershell'
+  gem 'rex-powershell', path: '../rex-powershell'
 end