Bump pillow from 9.1.1 to 9.3.0 in /docker

Bumps [pillow](https://github.com/python-pillow/Pillow) from 9.1.1 to 9.3.0.
- [Release notes](https://github.com/python-pillow/Pillow/releases)
- [Changelog](https://github.com/python-pillow/Pillow/blob/main/CHANGES.rst)
- [Commits](python-pillow/Pillow@9.1.1...9.3.0)

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

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

Author: dependabot[bot]

docker/dev.requirements.txt

@@ -140,7 +140,7 @@ pandocfilters==1.5.0
 parso==0.8.3
 pexpect==4.8.0
 pickleshare==0.7.5
-Pillow==9.1.1
+Pillow==9.3.0
 prometheus-client==0.14.1
 promise==2.3
 prompt-toolkit==3.0.29