fix case

Author: o2sh

docs/vercel/src/Index.svelte

@@ -53,7 +53,7 @@
     <small>
       <a href="https://github.com/o2sh/onefetch/wiki">wiki</a> |
       <a href="https://github.com/o2sh/onefetch/tree/main/docs/vercel"
-        >gitHub</a>
+        >github</a>
       | built with ❤ by
       <a href="https://github.com/spenserblack">@spenserblack</a> and
       <a href="https://github.com/o2sh">@o2sh</a></small>