Set max of 4 supported release boxes on landing page (#48760)

src/landings/components/ProductReleases.tsx

@@ -14,7 +14,7 @@ export function ProductReleases() {
   return (
     <div>
       <div className="d-lg-flex gutter-lg flex-items-stretch">
-        {ghesReleases.map((release) => {
+        {ghesReleases.slice(0, 4).map((release) => {
           const releaseNumber = release.version
           if (!enterpriseServerReleases.supported.includes(releaseNumber)) {
             return null