Allow win32ole test failure

```
D:/a/ruby/ruby/src/gems/src/win32ole/test/win32ole/test_win32ole_event.rb:80:in 'TestWIN32OLE_EVENT_SWbemSink#default_handler': undefined method '+' for nil (NoMethodError)
```

https://github.com/ruby/ruby/actions/runs/14299035797/job/40072083885?pr=13078

Author: hsbt

tool/test-bundled-gems.rb

@@ -10,7 +10,7 @@
 
 allowed_failures = ENV['TEST_BUNDLED_GEMS_ALLOW_FAILURES'] || ''
 if RUBY_PLATFORM =~ /mswin|mingw/
-  allowed_failures = [allowed_failures, "rbs,debug,irb"].join(',')
+  allowed_failures = [allowed_failures, "win32ole,rbs,debug,irb"].join(',')
 end
 allowed_failures = allowed_failures.split(',').uniq.reject(&:empty?)