Add NODES 23 ad (#561)

Author: recrwplay

preview.yml

@@ -53,3 +53,10 @@ asciidoc:
     cross-mark: icon:times[]
     neo4j-base-uri: https://neo4j.com
     neo4j-docs-base-uri: https://neo4j.com/docs
+    page-ad-overline-link: https://r.neo4j.com/nodes-2023
+    page-ad-overline: 26 October 2023
+    page-ad-title: NODES 23
+    page-ad-description: Join us for the biggest graph community conference dedicated to learning how to integrate graph technologies into ML and dev projects.
+    page-ad-link: https://neo4j.registration.goldcast.io/events/6fb85147-ca27-4310-9dec-cb345c53bd6f
+    page-ad-underline-role: button
+    page-ad-underline: Save your spot