Bot Updating Documentation

images/docker-healthchecks.md

@@ -182,6 +182,7 @@ We publish various [Docker Mods](https://github.com/linuxserver/docker-mods) to
 
 ## Versions
 
+* **18.05.21:** - Add linuxserver wheel index.
 * **11.01.21:** - Add libffi-dev to allow building of python cryptography lib.
 * **19.07.20:** - Rebasing to alpine 3.12, fixed 'ALLOWED_HOSTS' bug, now defaults to wildcard
 * **19.12.19:** - Rebasing to alpine 3.11.