Docker images --> docker images

Author: behackl

README.md

@@ -6,7 +6,7 @@
     <a href="https://www.reddit.com/r/manim/"><img src="https://img.shields.io/reddit/subreddit-subscribers/manim.svg?color=orange&label=reddit" alt="Reddit" href=></a>
     <a href="https://discord.gg/mMRrZQW"><img src="https://img.shields.io/discord/581738731934056449.svg?label=discord&color=yellow" alt="Discord"></a>
     <a href="https://manimce.readthedocs.io/en/latest/"><img src="https://readthedocs.org/projects/manimce/badge/?version=latest" alt="Documentation Status"></a>
-    <a href="https://hub.docker.com/r/manimcommunity/manim"><img src="https://img.shields.io/docker/v/manimcommunity/manim?color=%23099cec&label=Docker%20image" alt="Docker image"> </a>
+    <a href="https://hub.docker.com/r/manimcommunity/manim"><img src="https://img.shields.io/docker/v/manimcommunity/manim?color=%23099cec&label=docker%20image" alt="Docker image"> </a>
     <img src="https://github.com/ManimCommunity/manim/workflows/CI/badge.svg" alt="CI">
     <br />
     <br />