Update the dev version to 5.19 (neo4j#1484)

Author: renetapopova

antora.yml

@@ -7,7 +7,7 @@ nav:
 asciidoc:
   attributes:
     neo4j-version: '5'
-    neo4j-version-minor: '5.18'
-    neo4j-version-exact: '5.18.0'
-    neo4j-buildnumber: '5.18'
-    neo4j-debian-package-version: '1:5.18.0@'
+    neo4j-version-minor: '5.19'
+    neo4j-version-exact: '5.19.0'
+    neo4j-buildnumber: '5.19'
+    neo4j-debian-package-version: '1:5.19.0@'