Bump flask-appbuilder from 2.3.4 to 4.3.0

Bumps [flask-appbuilder](https://github.com/dpgaspar/flask-appbuilder) from 2.3.4 to 4.3.0.
- [Release notes](https://github.com/dpgaspar/flask-appbuilder/releases)
- [Changelog](https://github.com/dpgaspar/Flask-AppBuilder/blob/master/CHANGELOG.rst)
- [Commits](dpgaspar/Flask-AppBuilder@v2.3.4...v4.3.0)

---
updated-dependencies:
- dependency-name: flask-appbuilder
  dependency-type: direct:production
...

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

Author: dependabot[bot]