fix: Only specify icon height for better ratio

Author: FoxxMD

README.md

@@ -5,7 +5,7 @@
 [![Docker Pulls](https://img.shields.io/docker/pulls/foxxmd/tautulli-notification-digest)](https://hub.docker.com/r/foxxmd/tautulli-notification-digest)
 
 <img src="/docs/assets/icon.png" align="right"
-alt="multi-scrobbler logo" width="180" height="180">
+alt="multi-scrobbler logo" height="180">
 
 tautuilli-notification-digest (TND) creates "digest" (timed summary) notifications of **Media Added** events for discord using [Tautulli's](https://tautulli.com/) discord [notification agent](https://github.com/Tautulli/Tautulli/wiki/Notification-Agents-Guide#discord).