Bump version number to 4.4.43

Author: NataliaIvakina

antora.yml

@@ -7,6 +7,6 @@ nav:
 asciidoc:
   attributes:
     neo4j-version: '4.4'
-    neo4j-version-exact: '4.4.42'
+    neo4j-version-exact: '4.4.43'
     neo4j-buildnumber: '4.4'
     neo4j-debian-package-version: 1:4.4.41@