Bump jinja2 from 3.0.1 to 3.1.3 in /src/pyflask (#32)

Bumps [jinja2](https://github.com/pallets/jinja) from 3.0.1 to 3.1.3.
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/main/CHANGES.rst)
- [Commits](pallets/jinja@3.0.1...3.1.3)

---
updated-dependencies:
- dependency-name: jinja2
  dependency-type: direct:production
...

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Author: dependabot[bot]

src/pyflask/requirements.txt

@@ -7,7 +7,7 @@ Flask==2.0.1
 Flask-Cors==3.0.10
 flask-restx==0.5.1
 itsdangerous==2.0.1
-Jinja2==3.0.1
+Jinja2==3.1.3
 jsonschema==3.2.0
 MarkupSafe==2.0.1
 pyinstaller==4.5.1