Update the version number to 2025.04 (neo4j#2205)

Author: NataliaIvakina

antora.yml

@@ -1,14 +1,14 @@
 name: operations-manual
 title: Operations Manual
-version: '2025.03'
+version: '2025.04'
 current: true
 start_page: ROOT:index.adoc
 nav:
 - modules/ROOT/content-nav.adoc
 asciidoc:
   attributes:
-    neo4j-version: '2025.03'
-    neo4j-version-minor: '2025.03'
-    neo4j-version-exact: '2025.03.0'
-    neo4j-buildnumber: '2025.03'
-    neo4j-debian-package-version: '1:2025.03.0@'
+    neo4j-version: '2025.04'
+    neo4j-version-minor: '2025.04'
+    neo4j-version-exact: '2025.04.0'
+    neo4j-buildnumber: '2025.04'
+    neo4j-debian-package-version: '1:2025.04.0@'