deps: bump wavesurfer.js from 7.8.6 to 7.8.9

Bumps [wavesurfer.js](https://github.com/katspaugh/wavesurfer.js) from 7.8.6 to 7.8.9.
- [Release notes](https://github.com/katspaugh/wavesurfer.js/releases)
- [Commits](katspaugh/wavesurfer.js@7.8.6...7.8.9)

---
updated-dependencies:
- dependency-name: wavesurfer.js
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -51,7 +51,7 @@
     "remark-gfm": "^4.0.0",
     "remark-math": "^6.0.0",
     "uuid": "^10.0.0",
-    "wavesurfer.js": "^7.8.6",
+    "wavesurfer.js": "^7.8.9",
     "yancey-js-util": "^3.2.0"
   },
   "devDependencies": {