Bump jinja2 from 2.11.2 to 2.11.3 in /webapp

Bumps [jinja2](https://github.com/pallets/jinja) from 2.11.2 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@2.11.2...2.11.3)

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

Author: dependabot[bot]

webapp/requirements.txt

@@ -1,5 +1,5 @@
 requests==2.23.0 
 fastapi==0.65.2
 uvicorn==0.12.1
-jinja2==2.11.2
+jinja2==2.11.3
 aiofiles==0.5.0