Bump the pip group across 1 directory with 7 updates

Bumps the pip group with 7 updates in the /backend directory:

| Package | From | To |
| --- | --- | --- |
| [black](https://github.com/psf/black) | `21.5b2` | `24.3.0` |
| [flask](https://github.com/pallets/flask) | `1.1.2` | `2.2.5` |
| [flask-cors](https://github.com/corydolphin/flask-cors) | `3.0.10` | `4.0.1` |
| [jinja2](https://github.com/pallets/jinja) | `3.0.1` | `3.1.4` |
| [werkzeug](https://github.com/pallets/werkzeug) | `0.16.1` | `3.0.3` |
| [gunicorn](https://github.com/benoitc/gunicorn) | `20.1.0` | `22.0.0` |
| [dnspython](https://github.com/rthalley/dnspython) | `2.1.0` | `2.6.1` |



Updates `black` from 21.5b2 to 24.3.0
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](https://github.com/psf/black/commits/24.3.0)

Updates `flask` from 1.1.2 to 2.2.5
- [Release notes](https://github.com/pallets/flask/releases)
- [Changelog](https://github.com/pallets/flask/blob/main/CHANGES.rst)
- [Commits](pallets/flask@1.1.2...2.2.5)

Updates `flask-cors` from 3.0.10 to 4.0.1
- [Release notes](https://github.com/corydolphin/flask-cors/releases)
- [Changelog](https://github.com/corydolphin/flask-cors/blob/main/CHANGELOG.md)
- [Commits](corydolphin/flask-cors@3.0.10...4.0.1)

Updates `jinja2` from 3.0.1 to 3.1.4
- [Release notes](https://github.com/pallets/jinja/releases)
- [Changelog](https://github.com/pallets/jinja/blob/main/CHANGES.rst)
- [Commits](pallets/jinja@3.0.1...3.1.4)

Updates `werkzeug` from 0.16.1 to 3.0.3
- [Release notes](https://github.com/pallets/werkzeug/releases)
- [Changelog](https://github.com/pallets/werkzeug/blob/main/CHANGES.rst)
- [Commits](pallets/werkzeug@0.16.1...3.0.3)

Updates `gunicorn` from 20.1.0 to 22.0.0
- [Release notes](https://github.com/benoitc/gunicorn/releases)
- [Commits](benoitc/gunicorn@20.1.0...22.0.0)

Updates `dnspython` from 2.1.0 to 2.6.1
- [Release notes](https://github.com/rthalley/dnspython/releases)
- [Changelog](https://github.com/rthalley/dnspython/blob/main/doc/whatsnew.rst)
- [Commits](rthalley/dnspython@v2.1.0...v2.6.1)

---
updated-dependencies:
- dependency-name: black
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: flask
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: flask-cors
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: jinja2
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: werkzeug
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: gunicorn
  dependency-type: direct:production
  dependency-group: pip
- dependency-name: dnspython
  dependency-type: direct:production
  dependency-group: pip
...

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

backend/requirements.txt

@@ -2,19 +2,19 @@ aniso8601==9.0.1
 appdirs==1.4.4
 attrs==21.2.0
 bcrypt==3.2.0
-black==21.5b2
+black==24.3.0
 cffi==1.14.5
 click==8.0.1
-Flask==1.1.2
+Flask==2.2.5
 Flask-Bcrypt==0.7.1
-Flask-Cors==3.0.10
+Flask-Cors==4.0.1
 Flask-JWT-Extended==4.2.1
 flask-marshmallow==0.14.0
 flask-restplus==0.13.0
 Flask-SQLAlchemy==2.5.1
 greenlet==1.1.0
 itsdangerous==2.0.1
-Jinja2==3.0.1
+Jinja2==3.1.4
 jsonschema==3.2.0
 MarkupSafe==2.0.1
 marshmallow==3.12.1
@@ -31,7 +31,7 @@ SQLAlchemy==1.4.17
 sqlalchemy-cockroachdb==1.4.4
 toml==0.10.2
 typing==3.7.4.3
-Werkzeug==0.16.1
-gunicorn==20.1.0
-dnspython==2.1.0
+Werkzeug==3.0.3
+gunicorn==22.0.0
+dnspython==2.6.1
 psycopg2-binary==2.8.6