Add ruby:3.2 and adjust exclude list

Author: sanak

.github/workflows/test.yml

@@ -25,7 +25,7 @@ jobs:
       fail-fast: false
       matrix:
         redmine_version: [4.2-stable, 5.0-stable, master]
-        ruby_version: ['2.6', '2.7', '3.0', '3.1']
+        ruby_version: ['2.6', '2.7', '3.0', '3.1', '3.2']
         db: [mysql, postgres, sqlite]
         # # System test takes 2~3 times longer, so limit to specific matrix combinations
         # # See: https://docs.github.com/en/actions/using-jobs/using-a-matrix-for-your-jobs#expanding-or-adding-matrix-configurations
@@ -39,6 +39,12 @@ jobs:
             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'
+          - redmine_version: master
+            ruby_version: '2.6'
 
     services:
       mysql: