Added link to join operator in the docs
Added link to join operator in the docs

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