D:\a\Neothesia\Neothesia\./.github/actions/windows\action.yml (Line: 8, Col: 7): Unexpected value 'shell'

D:\a\Neothesia\Neothesia\./.github/actions/windows\action.yml (Line: 9, Col: 7): Required property is missing: shell

GitHub.DistributedTask.ObjectTemplating.TemplateValidationException: The template is not valid. D:\a\Neothesia\Neothesia\./.github/actions/windows\action.yml (Line: 8, Col: 7): Unexpected value 'shell',D:\a\Neothesia\Neothesia\./.github/actions/windows\action.yml (Line: 9, Col: 7): Required property is missing: shell at GitHub.DistributedTask.ObjectTemplating.TemplateValidationErrors.Check() at GitHub.Runner.Worker.ActionManifestManager.ConvertRuns(IExecutionContext executionContext, TemplateContext templateContext, TemplateToken inputsToken, String fileRelativePath, MappingToken outputs) at GitHub.Runner.Worker.ActionManifestManager.Load(IExecutionContext executionContext, String manifestFile)