add ruby 3.2 to the target, and remove older rubies

Author: nov

.github/workflows/spec.yml

@@ -13,12 +13,11 @@ jobs:
   spec:
     strategy:
       matrix:
-        os: ['ubuntu-20.04']
-        ruby-version: ['2.6', '2.7', '3.0', '3.1']
-        # ubuntu 22.04 only supports ssl 3 and thus only ruby 3.1
+        os: ['ubuntu-20.04', 'ubuntu-22.04']
+        ruby-version: ['3.1', '3.2']
         include:
-        - os: 'ubuntu-22.04'
-          ruby-version: '3.1'
+        - os: 'ubuntu-20.04'
+          ruby-version: '3.0'
     runs-on: ${{ matrix.os }}
 
     steps: