Update flask-appbuilder to 4.3.9

[pyup-bot]

This PR updates flask-appbuilder from 4.3.6 to 4.3.9.

Changelog

### 4.3.9 ``` ----------------------------------- - ci: create release script (2142) [Daniel Vaz Gaspar] - fix: wtforms compat on 3.1.0 (2138) [Daniel Vaz Gaspar] - docs: fix RTD config requirements (2140) [Daniel Vaz Gaspar] - docs: fix RTD config (2139) [Daniel Vaz Gaspar] - docs: add RTD required config (2135) [Daniel Vaz Gaspar] ``` ### 4.3.8 ``` ----------------------------------- - fix: filter list UI spacing between elements (2128) [Daniel Vaz Gaspar] - fix: add github sponsor (2130) [Daniel Vaz Gaspar] - docs: add github sponsor (2129) [Daniel Vaz Gaspar] - fix: swagger include js and css on static (2127) [Daniel Vaz Gaspar] - fix: Remove erroring endpoint "/login/<provider>/<register>" from AuthOAuthView (2120) [David Kalamarides] - fix: azure user info claims and JWT decode (2121) [Daniel Vaz Gaspar] - fix: Validate Azure JWTs using `authlib` (2112) [Daniel Wolf] - docs(typo): "preform" -> "perform" x4 (2123) [Sam Firke] ``` ### 4.3.7 ``` ----------------------------------- - fix: swagger missing nonce (2116) [Daniel Vaz Gaspar] ```

Links

- PyPI: https://pypi.org/project/flask-appbuilder - Changelog: https://data.safetycli.com/changelogs/flask-appbuilder/ - Repo: https://github.com/dpgaspar/flask-appbuilder/