updated shard description

Former-commit-id: dc7c843

Author: da1nerd

shard.yml

@@ -5,7 +5,7 @@ authors:
   - Joel Lonbeck <joel@neutrinographics.com>
 
 description: |
-  3D rendering engine.
+  A 3D rendering engine.
 
 crystal: 0.33.0