Update antora.yml to 2025.12

Author: NataliaIvakina

antora.yml

@@ -1,14 +1,14 @@
 name: java-reference
 title: Java Reference
-version: '2025.11'
+version: '2025.12'
 start_page: ROOT:index.adoc
 nav:
 - modules/ROOT/content-nav.adoc
 asciidoc:
   attributes:
-    neo4j-version: '2025.11'
-    neo4j-version-exact: '2025.11.0'
-    neo4j-buildnumber: '2025.11'
+    neo4j-version: '2025.12'
+    neo4j-version-exact: '2025.12.0'
+    neo4j-buildnumber: '2025.12'
     java-driver-version: '6.0.2'
     neo4j-documentation-branch: 'dev'
     page-origin-private: false