chore: also fix github capitalization

Author: SuperchupuDev

website/src/content/docs/index.mdx

@@ -202,7 +202,7 @@ import LinterExample from "@/components/linter/example.md";
       </a>
       <a href="https://github.com/biomejs/biome" class="github">
         <Icon name="github" />
-        <p>Github</p>
+        <p>GitHub</p>
       </a>
       <a href="https://twitter.com/biomejs" class="x">
         <Icon name="x.com" />