D:\a\wdl\wdl\./.github/actions/install-shellcheck\action.yaml (Line: 12, Col: 7): Required property is missing: shell

D:\a\wdl\wdl\./.github/actions/install-shellcheck\action.yaml (Line: 7, Col: 11): Unexpected symbol: '"Linux"'. Located at position 14 within expression: runner.os == "Linux"

D:\a\wdl\wdl\./.github/actions/install-shellcheck\action.yaml (Line: 13, Col: 11): Unexpected symbol: '"macOS"'. Located at position 14 within expression: runner.os == "macOS"

D:\a\wdl\wdl\./.github/actions/install-shellcheck\action.yaml (Line: 16, Col: 11): Unexpected symbol: '"Windows"'. Located at position 14 within expression: runner.os == "Windows"

GitHub.DistributedTask.ObjectTemplating.TemplateValidationException: The template is not valid. D:\a\wdl\wdl\./.github/actions/install-shellcheck\action.yaml (Line: 12, Col: 7): Required property is missing: shell,D:\a\wdl\wdl\./.github/actions/install-shellcheck\action.yaml (Line: 7, Col: 11): Unexpected symbol: '"Linux"'. Located at position 14 within expression: runner.os == "Linux",D:\a\wdl\wdl\./.github/actions/install-shellcheck\action.yaml (Line: 13, Col: 11): Unexpected symbol: '"macOS"'. Located at position 14 within expression: runner.os == "macOS",D:\a\wdl\wdl\./.github/actions/install-shellcheck\action.yaml (Line: 16, Col: 11): Unexpected symbol: '"Windows"'. Located at position 14 within expression: runner.os == "Windows" 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)