build(deps-dev): bump @babel/plugin-transform-async-generator-functions

Bumps [@babel/plugin-transform-async-generator-functions](https://github.com/babel/babel/tree/HEAD/packages/babel-plugin-transform-async-generator-functions) from 7.25.9 to 7.26.8.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/main/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/commits/v7.26.8/packages/babel-plugin-transform-async-generator-functions)

---
updated-dependencies:
- dependency-name: "@babel/plugin-transform-async-generator-functions"
  dependency-version: 7.26.8
  dependency-type: indirect
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]