Make links where there were none (#777)

Co-authored-by: Todd Ritchie <tritchie@vmware.com>

Co-authored-by: Todd Ritchie <tritchie@vmware.com>

CONTRIBUTING.md

@@ -247,13 +247,13 @@ the necessary bits.
 Although `2` is automated, it's still possible to do the procedure manually.
 
 ### Automatic release
-1. Check the previous release - https://github.com/vmware-tanzu/cartographer/releases
+1. Check the previous release - [https://github.com/vmware-tanzu/cartographer/releases](https://github.com/vmware-tanzu/cartographer/releases)
 2. Create a tag for the new release
 ```bash
 git tag v0.0.x # or v0.0.x-rc.n
 git push origin <tag-name>
 ```
-3. Ensure workflow has kicked off - https://github.com/vmware-tanzu/cartographer/actions
+3. Ensure workflow has kicked off - [https://github.com/vmware-tanzu/cartographer/actions](https://github.com/vmware-tanzu/cartographer/actions)
 
 
 ### Manually building and pushing release assets to GitHub