Update Nav Banner for VSCode's launch on Product Hunt (#239)

Author: julieg18

packages/gatsby-theme-iterative/src/components/LayoutHeader/Alert/content.tsx

@@ -6,9 +6,10 @@ export const AlertContent = () => (
     <span role="img" aria-label="rocket">
       🚀
     </span>{' '}
-    New Release!{' '}
-    <Link href="https://iterative.ai/blog/dvc-3.0-ml-experiments-data-versioning/">
-      The DVC 3.0 Stack: Beyond the Command Line
-    </Link>{' '}
+    Support our DVC Extension for VSCode on{' '}
+    <Link href="https://www.producthunt.com/posts/dvc-extension-for-vs-code">
+      Product Hunt
+    </Link>
+    !
   </>
 )