Bump flask-migrate from 4.0.4 to 4.0.7

Bumps [flask-migrate](https://github.com/miguelgrinberg/flask-migrate) from 4.0.4 to 4.0.7.
- [Release notes](https://github.com/miguelgrinberg/flask-migrate/releases)
- [Changelog](https://github.com/miguelgrinberg/Flask-Migrate/blob/main/CHANGES.md)
- [Commits](miguelgrinberg/Flask-Migrate@v4.0.4...v4.0.7)

---
updated-dependencies:
- dependency-name: flask-migrate
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -12,7 +12,7 @@ lxml==4.9.3
 pytz==2023.3.post1
 tzlocal==4.1
 markdown2==2.4.10
-flask-migrate==4.0.4
+flask-migrate==4.0.7
 flask-script==2.0.6
 email_validator
 gitdb==4.0.10