[rubygems/rubygems] Fix broken link in bundle issue output

ruby/rubygems@0909f07f30

Author: deivid-rodriguez

lib/bundler/cli/issue.rb

@@ -10,7 +10,7 @@ def run
         be sure to check out these resources:
 
         1. Check out our troubleshooting guide for quick fixes to common issues:
-        https://github.com/rubygems/rubygems/blob/master/bundler/doc/TROUBLESHOOTING.md
+        https://github.com/rubygems/rubygems/blob/master/doc/bundler/TROUBLESHOOTING.md
 
         2. Instructions for common Bundler uses can be found on the documentation
         site: https://bundler.io/