Bump jinja2 from 2.11.3 to 3.1.2 (#25)

Bumps [jinja2](https://github.com/pallets/jinja) from 2.11.3 to 3.1.2.
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/main/CHANGES.rst)
- [Commits](pallets/jinja@2.11.3...3.1.2)

---
updated-dependencies:
- dependency-name: jinja2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

requirements.txt

@@ -7,7 +7,7 @@ flask-cors==3.0.10
 flask-restful==0.3.8
 flask-sqlalchemy==2.4.3
 itsdangerous==1.1.0
-jinja2==2.11.3
+jinja2==3.1.2
 markupsafe==2.1.1
 pymongo==3.12.0
 pytz==2020.1