Bump flask-migrate from 4.0.5 to 4.0.6

Bumps [flask-migrate](https://github.com/miguelgrinberg/flask-migrate) from 4.0.5 to 4.0.6.
- [Release notes](https://github.com/miguelgrinberg/flask-migrate/releases)
- [Changelog](https://github.com/miguelgrinberg/Flask-Migrate/blob/main/CHANGES.md)
- [Commits](miguelgrinberg/Flask-Migrate@v4.0.5...v4.0.6)

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

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

src/requirements.txt

@@ -1,5 +1,5 @@
 Flask==3.0.2
-Flask-Migrate==4.0.5
+Flask-Migrate==4.0.6
 Flask-SQLAlchemy==3.1.1
 psycopg2-binary==2.9.9
 python-dotenv==1.0.1