add connections ad (#166)

Author: AlexicaWright

antora.yml

@@ -13,3 +13,10 @@ asciidoc:
     neo4j-documentation-branch: 'dev'
     page-origin-private: false
     neo4j-javadocs-base-uri: "https://neo4j.com/docs/java-reference/5/javadocs"
+    page-ad-overline-link: https://neo4j.com/connections/
+    page-ad-overline: 13 & 14 December 2023
+    page-ad-title: Neo4j Connections
+    page-ad-description: "Join us for a day of Generative AI and Knowledge Graphs: Unveiling the future of Knowledge Retrieval"
+    page-ad-link: https://neo4j.com/connections/
+    page-ad-underline-role: button
+    page-ad-underline: Save your spot