Improve help label on python script.

Co-authored-by: Anil Thanki <thanki.anil@gmail.com>

tools/tertiary-analysis/decoupler/decoupler_pathway_inference.py

@@ -12,7 +12,7 @@
 parser.add_argument(
     "-i", "--input",
     help=(
-        "AnnData or table input file. Table input is meant for a single "
+        "AnnData (.h5ad) or table input file (.tsv or .csv). Table input is meant for a single "
         "comparison, not gene x cells"
     ),
     required=True