Use lz4 for speedup metrics changelog.

Speedup ChangeLog compress.

LZMA

In [4]: %timeit lzma.compress(orjson.dumps({"x": 1, "x2": 2}))
1.05 ms ± 24.5 µs per loop (mean ± std. dev. of 7 runs, 1,000 loops each)

LZ4

In [5]: %timeit lz4.frame.compress(orjson.dumps({"x": 1, "x2": 2}))
1.31 µs ± 5.77 ns per loop (mean ± std. dev. of 7 runs, 1,000,000 loops each)