Update README.md

Author: meatballhat

README.md

@@ -8,3 +8,4 @@ See:
 - [redis-instance](./redis-instance) - a thin wrapper around the redis helm
   chart. you may want to directly reference the values.yaml file and extend it
 - [redis-tls](./redis-tls) - the above two, combined
+- [valkey](./valkey) - a helm chart that provides standalone, HA, and sentinel mode valkey deployments