change expected damage to make the tests pass

[DustinAlandzes]

the tests in master are failing right now, it's two tests in the same test suite

when calculating stats › when calculating total damage done › should ignore Pichu's self-damage
when calculating stats › when calculating total damage done › should include pummel damage

both are in test/stats.spec.ts

I changed these numbers:
21 -> 0
32 -> 22

https://github.com/project-slippi/slippi-js/pull/66/checks?check_run_id=2539370690#step:6:368

I think these commits caused the test to fail after changing the way damage was calculated
e61a58a
02ba277

[vinceau]

The tests in their current state are correct. You shouldn't make the tests incorrect just to make the tests pass. That defeats the purpose of the tests. For now, we've reverted the double stats computation logic (the cause of the failing tests) in #71.