Bump jinja2 from 2.11.1 to 2.11.3 in /web/notes

Bumps [jinja2](https://github.com/pallets/jinja) from 2.11.1 to 2.11.3.
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/master/CHANGES.rst)
- [Commits](pallets/jinja@2.11.1...2.11.3)

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

Author: dependabot[bot]

web/notes/requirements.txt

@@ -11,7 +11,7 @@ Flask-WTF==0.14.3
 gunicorn==20.0.4
 idna==2.9
 itsdangerous==1.1.0
-Jinja2==2.11.1
+Jinja2==2.11.3
 jsmin==2.2.2
 lesscpy==0.13.0
 markdown2==2.4.0