Add Ruby 3.2 to CI

Author: dipth

.github/workflows/rspec.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['2.6', '2.7', '3.0', '3.1']
+        ruby: ['2.6', '2.7', '3.0', '3.1', '3.2']
     steps:
     - uses: actions/checkout@v3
     - name: Set up Ruby