The job was canceled because "ubuntu-latest_boringssl" failed.

/home/runner/work/mlspp/mlspp/./.github/actions/build/action.yml (Line: 13, Col: 5): Required property is missing: shell

/home/runner/work/mlspp/mlspp/./.github/actions/build/action.yml (Line: 24, Col: 5): Required property is missing: shell

/home/runner/work/mlspp/mlspp/./.github/actions/build/action.yml (Line: 28, Col: 5): Required property is missing: shell

/home/runner/work/mlspp/mlspp/./.github/actions/build/action.yml (Line: 35, Col: 5): Required property is missing: shell

/home/runner/work/mlspp/mlspp/./.github/actions/build/action.yml (Line: 40, Col: 5): Required property is missing: shell

GitHub.DistributedTask.ObjectTemplating.TemplateValidationException: The template is not valid. /home/runner/work/mlspp/mlspp/./.github/actions/build/action.yml (Line: 13, Col: 5): Required property is missing: shell,/home/runner/work/mlspp/mlspp/./.github/actions/build/action.yml (Line: 24, Col: 5): Required property is missing: shell,/home/runner/work/mlspp/mlspp/./.github/actions/build/action.yml (Line: 28, Col: 5): Required property is missing: shell,/home/runner/work/mlspp/mlspp/./.github/actions/build/action.yml (Line: 35, Col: 5): Required property is missing: shell,/home/runner/work/mlspp/mlspp/./.github/actions/build/action.yml (Line: 40, Col: 5): 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)