Bump pillow from 8.3.2 to 8.4.0

Bumps [pillow](https://github.com/python-pillow/Pillow) from 8.3.2 to 8.4.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](https://github.com/python-pillow/Pillow/compare/8.3.2...8.4.0)

---
updated-dependencies:
- dependency-name: pillow
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -13,20 +13,20 @@ bleach-allowlist==1.0.3
 gunicorn==20.1.0
 lxml==4.6.3
 Markdown==3.3.4
-Pillow==8.3.2
+Pillow==8.4.0
 psycopg2-binary==2.9.1
-python-dotenv==0.19.0
+python-dotenv==0.19.1
 requests==2.26.0
 simplejson==3.17.5
 six==1.16.0
 webdavclient3==3.14.6
 whitenoise==5.3.0
 icalendar==4.0.7
-pyyaml==5.4.1
+pyyaml==6.0
 uritemplate==3.0.1
 beautifulsoup4==4.10.0
 microdata==0.7.1
-Jinja2==3.0.1
+Jinja2==3.0.2
 django-webpack-loader==1.4.1
 django-js-reverse==0.9.1
 django-allauth==0.45.0