Change sample_sheet to lowercase

bin/import_jovian_output.py

@@ -108,7 +108,7 @@ Output: a list of files to move or copy.
         # sample_sheet.yaml
         # results/all_taxClassified.tsv for classifications
         # results/counts/Mapped_read_counts.tsv for read counts
-        sample_sheet = input_dir / "Sample_sheet.yaml"
+        sample_sheet = input_dir / "sample_sheet.yaml"
         if sample_sheet.exists():
             print("Sample sheet '%s' has been detected." % sample_sheet)
             print("Reading sample sheet to infer required samples/data files.")