Set rspec CI ruby matrix back to original order

.github/workflows/lint.yml

@@ -22,7 +22,7 @@ jobs:
 
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3.1.2
+          ruby-version: ${{ matrix.ruby }}
           bundler-cache: true
 
       - name: rubocop

.github/workflows/test.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [ '3.1.2', '2.7.5' ]
+        ruby: [ '2.7.5', '3.1.2' ]
     permissions:
       contents: read