Update documentation for tag directive
Update documentation for tag directive

nextflow-io/nextflow,heuermh/nextflow,nextflow-io/nextflow,heuermh/nextflow,robsyme/nextflow,nextflow-io/nextflow,robsyme/nextflow,nextflow-io/nextflow,heuermh/nextflow,robsyme/nextflow,heuermh/nextflow,robsyme/nextflow,nextflow-io/nextflow,heuermh/nextflow,robsyme/nextflow