fix: add margin bottom bellow contact us button on mobile view

Author: ivke995

apps/website/src/components/navigation.astro

@@ -192,7 +192,7 @@ const caseStudies = [
     </a>
     <a
       class="font-medium
-          w-full !h-[40px] items-center px-4 py-2 rounded-md
+          w-full !h-[40px] items-center px-4 py-2 rounded-md mb-5 md:mb-0
           text-base text-center whitespace-nowrap bg-crocoder-yellow text-contrast hover:opacity-90
           inline-block"
       href="/contact"