fix some typos in optimize-storage.md

[riadhmouamnia]

I just noticed some typos while I was learning this lib:

1. I think the writer of this doc meant to say "kind of mouse interactions" not "kins of..." in:

sampling: {
    // Configure which kins of mouse interaction should be recorded
    mouseInteraction: {

2. The imported pack and unpack functions should be used instead of rrweb.pack and rrweb.unpack

// Recorder side
import { pack } from '@rrweb/packer';

rrweb.record({
  emit(event) {},
  packFn: rrweb.pack,
});

// Replayer Side
import { unpack } from '@rrweb/packer';

const replayer = new rrweb.Replayer(events, {
  unpackFn: rrweb.unpack,
});

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[eoghanmurray]

Suggested change

	// Configure which kind of mouse interactions should be recorded
	// Configure which kinds of mouse interaction should be recorded

[Juice10]

Thank you @riadhmouamnia!