update macos executor

Direct users to the xcode versions page for more information.

Author: sararead

jekyll/_cci2/executor-types.md

@@ -150,7 +150,7 @@ jobs:
 
 ## Using macOS
 
-Using the `macos` executor allows you to run your job in a macOS environment on a VM. You can also specify which version of Xcode should be used. See the [Supported Xcode Versions section of the Testing iOS]({{ site.baseurl }}/2.0/testing-ios/#supported-xcode-versions) document for the complete list of version numbers. See the "Installed Software" links in that document for specific information about technical specifications (CPU, RAM, HD) for the VMs running each particular version of Xcode.
+Using the `macos` executor allows you to run your job in a macOS environment on a VM. You can also specify which version of Xcode should be used. See the [Supported Xcode Versions section of the Testing iOS]({{ site.baseurl }}/2.0/testing-ios/#supported-xcode-versions) document for the complete list of version numbers and information about technical specifications for the VMs running each particular version of Xcode.
 
 ```
 jobs: