update charter markdown link

Author: danielwzyang

src/pages/resources/charter.astro

@@ -3,7 +3,7 @@ import PageSite from '@layouts/PageSite.astro';
 import { marked } from 'marked';
 
 const res = await fetch(
-  'https://raw.githubusercontent.com/StuyPulse/Charter/main/README.md'
+  'https://raw.githubusercontent.com/StuyPulse/charter.stuypulse.com/refs/heads/main/README.md'
 );
 
 // trusting that theres no XSS in the charter lols