Add reddit badge (#510)

Signed-off-by: Luke Hinds <lukehinds@gmail.com>

Author: lukehinds

README.md

@@ -33,6 +33,9 @@
     <a href="https://discord.gg/pPcjYzGvbS">
       <img src="https://img.shields.io/discord/1384081906773131274?color=7289da&label=Discord&logo=discord&logoColor=white" alt="Discord"/>
     </a>
+    <a href="https://www.reddit.com/r/deepfabric/">
+      <img src="https://img.shields.io/badge/Reddit-r%2Fdeepfabric-FF4500?logo=reddit&logoColor=white" alt="Reddit"/>
+    </a>
   </p>
 </div>