Disable link checking for learn.newrelic.com

Author: TimPansino

README.md

@@ -124,8 +124,8 @@ file a Github issue.
     The best place to engage in troubleshooting questions
 - [New Relic Developer](https://developer.newrelic.com/): Resources
     for building a custom observability applications
-- [New Relic University](https://learn.newrelic.com/): A range of
-    online training for New Relic users of every level
+- [New Relic University](https://learn.newrelic.com/): <!-- markdown-link-check-disable-line -->
+    A range of online training for New Relic users of every level
 - [New Relic Technical Support](https://support.newrelic.com/)
     24/7/365 ticketed support. Read more about our [Technical Support
     Offerings](https://docs.newrelic.com/docs/licenses/license-information/general-usage-licenses/support-plan).