Merge pull request #9475 from OughtPuts/ho/fix-readme-contributing-link

Fix 'guide to contributing' Link in README

Author: eileencodes

README.md

@@ -110,7 +110,7 @@ RubyGems is managed by [Ruby Central](https://rubycentral.org), a non-profit org
 
 ### Contributing
 
-If you'd like to contribute to RubyGems, that's awesome, and we <3 you. Check out our [guide to contributing](doc/rubygems/CONTRIBUTING.md) for more information.
+If you'd like to contribute to RubyGems, that's awesome, and we <3 you. Check out our [guide to contributing](CONTRIBUTING.md) for more information.
 
 ### Code of Conduct