CI: Drop Windows Ruby 3.1 testing

In reality, we require Ruby 3.2. On Linux we also test on Ruby 3.2+.

Author: bastelfreak

.github/workflows/tests.yaml

@@ -42,14 +42,13 @@ jobs:
       fail-fast: false
       matrix:
         cfg:
-          - {os: ubuntu-24.04, ruby: '3.2'} # openssl 3
-          - {os: ubuntu-24.04, ruby: '3.3'} # openssl 3
-          - {os: ubuntu-24.04, ruby: '3.4'} # openssl 3
+          - {os: ubuntu-24.04, ruby: '3.2'}
+          - {os: ubuntu-24.04, ruby: '3.3'}
+          - {os: ubuntu-24.04, ruby: '3.4'}
           - {os: ubuntu-24.04, ruby: 'jruby-9.4'}
-          - {os: windows-2025, ruby: '3.1'}
-          - {os: windows-2025, ruby: '3.2'} # openssl 3
-          - {os: windows-2025, ruby: '3.3'} # openssl 3
-          - {os: windows-2025, ruby: '3.4'} # openssl 3
+          - {os: windows-2025, ruby: '3.2'}
+          - {os: windows-2025, ruby: '3.3'}
+          - {os: windows-2025, ruby: '3.4'}
 
     runs-on: ${{ matrix.cfg.os }}
     steps: