fix(deps): update dependency wavesurfer.js to v7.9.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
wavesurfer.js (source)	7.9.1 -> 7.9.4

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Release Notes

katspaugh/wavesurfer.js (wavesurfer.js)

v7.9.4

Compare Source

• 7.9.4
• Fix(Timeline): fix iteration over fractional time intervals (#​4073) by @​vitalyster

v7.9.3

Compare Source

• 7.9.3
• Fix(Web Audio): prevent race condition in stopAt method (#​4067) by @​OwLu0905

v7.9.2

Compare Source

• 7.9.2
• Fix: play(start, stop) with WebAudio backend not worked (#​4066) by @​OwLu0905
• Tests: change the redrawcomplete event to redraw (#​4061) by @​shahil-yadav
• Docs: fix Regions docs link

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