CI against Ruby 3.2

Author: amatsuda

.github/workflows/ci.yml

@@ -37,6 +37,10 @@ jobs:
             env:
               BRANCH: 7-0-stable
             experimental: false
+          - ruby: "3.2"
+            env:
+              BRANCH: 7-0-stable
+            experimental: false
           - ruby: "2.7"
             env:
               BRANCH: main
@@ -49,6 +53,10 @@ jobs:
             env:
               BRANCH: main
             experimental: true
+          - ruby: "3.2"
+            env:
+              BRANCH: main
+            experimental: true
           - ruby: head
             env:
               BRANCH: main