Fix broken links to comp-mgr pages and remove comp-mgr from the link check ignore list

Author: jeff-matthews

guides/v2.2/comp-mgr/upgrader/upgrade-start.md

@@ -53,7 +53,7 @@ To run System Upgrade:
 
 #### Error
 
-The following error can indicate one of several issues, including that you haven't entered your [authentication keys]({{ page.baseurl }}/comp-mgr/prereq/prereq_auth-token.html) in the Magento Admin:
+The following error can indicate one of several issues, including that you haven't entered your [authentication keys]({{ page.baseurl }}/install-gde/prereq/connect-auth.html) in the Magento Admin:
 
 ![]({{ site.baseurl }}/common/images/upgr-sorry.png)
 

rakelib/proofer.rb

@@ -26,7 +26,6 @@ module Proofer
   URL_IGNORE = %w[
     account.magento.com
     architecture
-    comp-mgr
     config-guide
     docs.magento.com
     extension-dev-guide