Update the exact version to 4.4.45 (#2553)

Author: NataliaIvakina

antora.yml

@@ -7,6 +7,6 @@ nav:
 asciidoc:
   attributes:
     neo4j-version: '4.4'
-    neo4j-version-exact: '4.4.44'
+    neo4j-version-exact: '4.4.45'
     neo4j-buildnumber: '4.4'
-    neo4j-debian-package-version: 1:4.4.44@
+    neo4j-debian-package-version: 1:4.4.45@