Bump pillow from 7.2.0 to 9.0.1

Bumps [pillow](https://github.com/python-pillow/Pillow) from 7.2.0 to 9.0.1.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@7.2.0...9.0.1)

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

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

requirements.txt

@@ -11,7 +11,7 @@ Flask-Migrate==2.1.1
 Flask-SQLAlchemy==2.4.4
 Flask-WTF==0.14.3
 Flask-Sitemap==0.3.0
-Pillow==7.2.0
+Pillow==9.0.1
 psycopg2==2.8.5 --no-binary psycopg2
 python-dateutil==2.8.1
 SQLAlchemy==1.3.0