Bump jinja2 from 2.10.1 to 2.11.3 in /frameworks/Python/flask (#6468)

Bumps [jinja2](https://github.com/pallets/jinja) from 2.10.1 to 2.11.3.
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/master/CHANGES.rst)
- [Commits](https://github.com/pallets/jinja/compare/2.10.1...2.11.3)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

frameworks/Python/flask/requirements-pypy.txt

@@ -7,7 +7,7 @@ Flask-SQLAlchemy==2.3.2
 greenlet==0.4.14
 gunicorn==19.9.0
 itsdangerous==0.24
-Jinja2==2.10.1
+Jinja2==2.11.3
 MarkupSafe==1.0
 PyMySQL==0.8.0
 readline==6.2.4.1

frameworks/Python/flask/requirements.txt

@@ -4,7 +4,7 @@ Flask-SQLAlchemy==2.3.2
 greenlet==0.4.14
 gunicorn==19.9.0
 itsdangerous==0.24
-Jinja2==2.10.1
+Jinja2==2.11.3
 MarkupSafe==1.0
 meinheld==0.6.1
 mysqlclient==1.3.12