Suggested fix to Zstd tar codec

[lmmx]

Comment from Ma Lin: ae185f9#r54497564

I search pyzstd on GitHub (I'm the author of it), then I found this code.

The .close() method was updated. If super().close() fails, .zstd_file can be closed at once.
This is a very minor fix.

            def close(self):
                try:
                    super().close()
                finally:
                    self.zstd_file.close()

in reference to

range-streams/src/range_streams/codecs/zstd/tar.py

Lines 25 to 27 in 052274a

	def close(self): # pragma: no cover
	super().close()
	self.zstd_file.close()