Fix: uneven margin around the help translate link

The "Help translate BlitzKit" link on the home page had only a bottom margin, so it sat flush against the hero above while the tool grid below added extra space.

Add a top margin so the space above matches the space below, leaving the bottom margin unchanged.

packages/website/src/pages/[...chunk_default]/[...locale]/index.astro

@@ -67,7 +67,7 @@ export const getStaticPaths = mixStaticPaths(_getStaticPaths, () => {
 
   {
     locale !== locales.default && (
-      <Flex justify="center" mb="4">
+      <Flex justify="center" mt="7" mb="4">
         <Link
           href="https://crowdin.com/project/blitzkrieg"
           target="_blank"