build(deps): bump flask-wtf from 1.1.1 to 1.2.1

Bumps [flask-wtf](https://github.com/wtforms/flask-wtf) from 1.1.1 to 1.2.1.
- [Release notes](https://github.com/wtforms/flask-wtf/releases)
- [Changelog](https://github.com/wtforms/flask-wtf/blob/main/docs/changes.rst)
- [Commits](pallets-eco/flask-wtf@v1.1.1...v1.2.1)

---
updated-dependencies:
- dependency-name: flask-wtf
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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