Update actions

Author: Daniel Thies

.github/workflows/moodle-ci.yml

@@ -1,6 +1,6 @@
 name: Moodle Plugin CI
 
-on: [pull_request]
+on: [push, pull_request]
 
 jobs:
   test:
@@ -34,18 +34,6 @@ jobs:
           - php: '8.0'
             moodle-branch: 'MOODLE_401_STABLE'
             database: 'mariadb'
-          - php: '8.0'
-            moodle-branch: 'MOODLE_400_STABLE'
-            database: 'pgsql'
-          - php: '7.4'
-            moodle-branch: 'MOODLE_311_STABLE'
-            database: 'mariadb'
-          - php: '7.4'
-            moodle-branch: 'MOODLE_310_STABLE'
-            database: 'pgsql'
-          - php: '7.4'
-            moodle-branch: 'MOODLE_39_STABLE'
-            database: 'mariadb'
 
     steps:
       - name: Check out repository code