Add Ruby 3.2 to the CI matrix. Also update checkout action version.

Author: petergoldstein

.github/workflows/stable.yml

@@ -8,14 +8,14 @@ jobs:
 
     strategy:
       matrix:
-        ruby: [2.7, '3.0', 3.1, ruby-head, jruby-9.3]
+        ruby: [2.7, '3.0', 3.1, 3.2, ruby-head, jruby-9.3]
 
     env:
       BUNDLE_WITHOUT: "benchmark"
       JRUBY_OPTS: "--debug"
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Get sqlite for Rails test projects
         run: sudo apt-get install libsqlite3-dev

.github/workflows/unstable.yml

@@ -13,7 +13,7 @@ jobs:
         ruby: [ruby-head, jruby-head]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
 
       - name: Set up RVM
         run: curl -sSL https://get.rvm.io | bash