Prefix binstub for Windows

Author: andyw8

.github/workflows/ci.yml

@@ -55,4 +55,4 @@ jobs:
         run: bin/rubocop
 
       - name: Run tests
-        run: bin/rails db:setup && bin/rails db:migrate && bin/rails test
+        run: ruby bin/rails db:setup && ruby bin/rails db:migrate && ruby bin/rails test