change default bracken levels, not all databases have them all

workflows/workflow_kraken2-bracken.cwl

@@ -78,8 +78,8 @@ inputs:
   bracken_levels:
     type: string[]
     label: Bracken levels
-    doc: Taxonomy levels in bracken estimate abundances on. Default runs through; [D,P,C,O,F,G,S,S1]
-    default: [D,P,C,O,F,G,S,S1]
+    doc: Taxonomy levels in bracken estimate abundances on. Default runs through; [P,C,O,F,G,S]
+    default: [P,C,O,F,G,S]
 
   # Input provenance (to be ignored when prov is not used)
   destination: