Add build for 4.03

Part of the 4.3 release process [1 week before the release](https://moodledev.io/general/development/process/release#1-week-prior)

Author: junpataleta

.github/workflows/publish-apidocs.yml

@@ -1,8 +1,8 @@
 name: Generate API docs and publish to Github Pages
 
 env:
-  BRANCHLIST: "MOODLE_311_STABLE MOODLE_400_STABLE MOODLE_401_STABLE MOODLE_402_STABLE master"
-  VERSIONLIST: "3.11 4.00 4.01 4.02 master"
+  BRANCHLIST: "MOODLE_311_STABLE MOODLE_400_STABLE MOODLE_401_STABLE MOODLE_402_STABLE MOODLE_403_STABLE master"
+  VERSIONLIST: "3.11 4.00 4.01 4.02 4.03 master"
 
 on:
   schedule: