Merge pull request #427 from nextflow-io/vdauwera-patch-hello-operators

Fix error in Operators instructions

Author: mribeirodantas

docs/hello_nextflow/05_hello_operators.md

@@ -791,7 +791,6 @@ GATK_GENOMICSDB(
     all_gvcfs_ch,
     all_idxs_ch,
     intervals_file,
-    path interval_list,
     params.cohort_name
 )
 ```