verifybinaries: fix OS download filter

Co-authored-by: Reproducibility Matters <seb.kung@gmail.com>

Author: theuni

contrib/verifybinaries/verify.py

@@ -511,7 +511,7 @@ def cleanup():
         return sigs_status
 
     # Extract hashes and filenames
-    hashes_to_verify = parse_sums_file(SUMS_FILENAME, os_filter)
+    hashes_to_verify = parse_sums_file(SUMS_FILENAME, [os_filter])
     if not hashes_to_verify:
         log.error("no files matched the platform specified")
         return ReturnCode.NO_BINARIES_MATCH