Use setup-ruby@master to partially fix the cycle for new runner images

* So this workflow works on ubuntu-24.04 without needing a release.

Author: eregon

.github/workflows/build.yml

@@ -114,7 +114,7 @@ jobs:
 
     # Check
     - name: Setup BASERUBY
-      uses: ruby/setup-ruby@v1
+      uses: ruby/setup-ruby@master
       with:
         ruby-version: 3.2