Change misleading zip64 limit error message

This error message is confusing as it seems to indicate that the file is already using zip64. This new message makes it more clear what the problem is, and will help guide developers to find the solution. (That is, to use in `ZipFile.open(force_zip64=True`))

Author: dmjohnsson23

Lib/zipfile.py

@@ -1206,10 +1206,10 @@ def close(self):
  if not self._zip64:
  if self._file_size > ZIP64_LIMIT:
  raise RuntimeError(
- 'File size unexpectedly exceeded ZIP64 limit')
+ 'File size too large, try using force_zip64')
  if self._compress_size > ZIP64_LIMIT:
  raise RuntimeError(
- 'Compressed size unexpectedly exceeded ZIP64 limit')
+ 'Compressed size too large, try using force_zip64')
  # Seek backwards and write file header (which will now include
  # correct CRC and file sizes)