Bump pillow from 7.0.0 to 8.1.1 in /ford vs ferrari

Bumps [pillow](https://github.com/python-pillow/Pillow) from 7.0.0 to 8.1.1.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/master/CHANGES.rst)
- [Commits](python-pillow/Pillow@7.0.0...8.1.1)

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

ford vs ferrari/requirements.txt

@@ -154,7 +154,7 @@ patsy==0.5.1
 pep8==1.7.1
 pexpect==4.8.0
 pickleshare==0.7.5
-Pillow==7.0.0
+Pillow==8.1.1
 pkginfo==1.5.0.1
 plotly==4.13.0
 pluggy==0.13.1