Add Ruby 3.2 to CI. Upgrade checkout action versions.

Author: petergoldstein

.github/workflows/ruby.yml

@@ -20,10 +20,10 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby-version: ['2.5', '2.6', '2.7', '3.0', '3.1', 'head']
+        ruby-version: ['2.5', '2.6', '2.7', '3.0', '3.1', '3.2', 'head']
 
     steps:
-    - uses: actions/checkout@v2.4.0
+    - uses: actions/checkout@v3
     - name: Install libcurl dev (for ovirt native extensions)
       run: sudo apt-get install libcurl4-openssl-dev
     - name: Set up Ruby
@@ -40,7 +40,7 @@ jobs:
     name: Rubocop
     runs-on: 'ubuntu-20.04'
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with: