Update manual symlink

Author: i80and

config/redirects

@@ -1,6 +1,6 @@
 define: base https://docs.mongodb.com
 define: versions v2.2 v2.4 v2.6 v3.0 v3.2 v3.4 v3.6 v4.0 v4.2 v4.4 v5.0 master
-symlink: manual -> v4.4
+symlink: manual -> v5.0
 symlink: upcoming -> v5.0
 symlink: master -> v5.0