Index Typo Fix

Deleted a stray ] character.

Author: ecourt93

index.md

@@ -11,7 +11,7 @@
 :::::{grid} 2
 
 ::::{grid-item}
-:::{card} ✿ Contribute to Open Source ✿]
+:::{card} ✿ Contribute to Open Source ✿
 :class-card: left-aligned
 
 Learn how to navigate the technical and [social elements](social-github) of making a contribution to open source code on GitHub.