fix(tar): fix verbosity in checksum checker in tar handler

The logger debug was being shown at every level of verbosity. The underscore fixes this.

unblob/handlers/archive/tar.py

@@ -143,7 +143,7 @@ def signed_sum(octets) -> int:
                 "Invalid checksum format",
                 actual_last_2_bytes=header.chksum[6:8],
                 handler=self.NAME,
-                verbosity=3,
+                _verbosity=3,
             )
             return None
         checksum = decode_int(header.chksum[:6], 8)