Blog: update banner to mention security release (nodejs#6864)

Author: RafaelGSS

site.json

@@ -29,11 +29,11 @@
   ],
   "websiteBanners": {
     "index": {
-      "startDate": "2024-04-24T03:00:00.000Z",
-      "endDate": "2024-05-17T17:30:00.000Z",
-      "text": "Node.js v22 is now available!",
-      "link": "https://nodejs.org/en/blog/announcements/v22-release-announce",
-      "type": "default"
+      "startDate": "2024-06-26T00:00:00.000Z",
+      "endDate": "2024-07-02T00:00:00.000Z",
+      "text": "New security releases to be made available July 2nd, 2024",
+      "link": "https://nodejs.org/en/blog/vulnerability/july-2024-security-releases",
+      "type": "warning"
     }
   },
   "websiteBadges": {