Require rspec to pass for rails 8

Author: rsmithlal

.github/workflows/rubyonrails.yml

@@ -15,7 +15,7 @@ jobs:
             allowed_failure: false   # ✅ required
           - ruby: '3.4.4'
             rails: '8.0.2'
-            allowed_failure: true    # ⚠️ allowed to fail
+            allowed_failure: false   # ✅ required
 
     env:
       RAILS_ENV: test