comments.yml in rbs-2.8.3

- old
+ new

@@ -8,10 +8,10 @@
 
 jobs:
   test:
     runs-on: "ubuntu-latest"
     container:
-      image: rubylang/ruby:3.1-focal
+      image: rubylang/ruby:3.1-dev-focal
     steps:
       - uses: actions/checkout@v3
       - name: Install dependencies
         run: |
           apt-get update