Refs #25501 -- Fixed a typo in django/core/cache/backends/filebased.py

The original intent in refs #20536 was to use the highest protocol.
Calling zlib.compress() with a compression level of -1 seems to
fall back to the default level of 6.

django/core/cache/backends/filebased.py

@@ -55,7 +55,7 @@ class FileBasedCache(BaseCache):
             with io.open(fd, 'wb') as f:
                 expiry = self.get_backend_timeout(timeout)
                 f.write(pickle.dumps(expiry, pickle.HIGHEST_PROTOCOL))
-                f.write(zlib.compress(pickle.dumps(value, pickle.HIGHEST_PROTOCOL), -1))
+                f.write(zlib.compress(pickle.dumps(value, pickle.HIGHEST_PROTOCOL)))
             file_move_safe(tmp_path, fname, allow_overwrite=True)
             renamed = True
         finally: