Update CI matrix

Author: sanak

.github/workflows/test-postgis.yml

@@ -25,13 +25,17 @@ jobs:
       fail-fast: false
       matrix:
         redmine_version: [4.2-stable, 5.0-stable, master]
-        ruby_version: ['2.7', '3.0', '3.1']
-        db_version: [11-2.5, 14-3.2]
+        ruby_version: ['2.7', '3.0', '3.1', '3.2']
+        db_version: [11-2.5, 15-3.3]
         exclude:
           - redmine_version: 4.2-stable
             ruby_version: 3.0
           - redmine_version: 4.2-stable
             ruby_version: 3.1
+          - redmine_version: 4.2-stable
+            ruby_version: 3.2
+          - redmine_version: 5.0-stable
+            ruby_version: 3.2
 
     services:
       postgres: