Bump flask-wtf in /{{cookiecutter.app_name}}/requirements

Bumps [flask-wtf](https://github.com/lepture/flask-wtf) from 0.14.2 to 0.14.3.
- [Release notes](https://github.com/lepture/flask-wtf/releases)
- [Changelog](https://github.com/lepture/flask-wtf/blob/master/docs/changelog.rst)
- [Commits](https://github.com/lepture/flask-wtf/compare/v0.14.2...0.14.3

)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

{{cookiecutter.app_name}}/requirements/prod.txt

@@ -14,7 +14,7 @@ psycopg2-binary==2.8.4
 Flask-Migrate==2.5.2
 
 # Forms
-Flask-WTF==0.14.2
+Flask-WTF==0.14.3
 WTForms==2.2.1
 
 # Deployment