correct a link to github repo

Author: earth-walker

docs/src/content/docs/index.mdx

@@ -15,7 +15,7 @@ hero:
       icon: external
       variant: secondary
     - text: Visit GitHub repo
-      link: https://codeforphilly.github.io/benefit-decision-toolkit/
+      link: https://github.com/CodeForPhilly/benefit-decision-toolkit
       icon: github
       variant: secondary
 ---