upgrade: Allow Pro docs to change Lua HTTP API upgrading title

Author: sirainen

docs/installation/upgrade/2.3-to-2.4.md

@@ -123,6 +123,8 @@ https://github.com/dovecot/tools/blob/main/dovecot-2.4.0-example-config.tar.gz
 
 <!-- @include: include/2.4-acls.inc -->
 
+### Lua HTTP API
+
 <!-- @include: include/2.4-lua-http.inc -->
 
 ### Lua Authentication

docs/installation/upgrade/include/2.4-lua-http.inc

@@ -1,4 +1,2 @@
-### Lua HTTP API
-
 Some settings were renamed. See [[link,lua_lib-http]]. The `debug` setting
 was removed - use [[setting,log_debug]] instead to enable debugging.