README: Add link to contrib repository (#1331)

* Add link to contrib repository

* Update README.md

Co-authored-by: Ariel Valentin <arielvalentin@users.noreply.github.com>

Co-authored-by: Ariel Valentin <arielvalentin@users.noreply.github.com>

README.md

@@ -46,7 +46,7 @@ Maintainers ([@open-telemetry/ruby-maintainers](https://github.com/orgs/open-tel
 
 ## Contrib Repository
 
-The contrib repository contains instrumentation libraries for many popular Ruby gems, including Rails, Rack, Sinatra, and others, so you can start using OpenTelemetry with minimal changes to your application. See the [contrib README][contrib-repo] for more details.
+The [opentelemetry-ruby-contrib repository][contrib-repo] contains instrumentation libraries for many popular Ruby gems, including Rails, Rack, Sinatra, and others, so you can start using OpenTelemetry with minimal changes to your application. See the [contrib README][contrib-repo] for more details.
 
 ## Versioning