Bump pillow from 10.2.0 to 10.3.0 in /modules/sync

Bumps [pillow](https://github.com/python-pillow/Pillow) from 10.2.0 to 10.3.0.
- [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/10.2.0...10.3.0)

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

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

modules/sync/requirements.txt

@@ -1,7 +1,7 @@
 cssselect==0.9.2
 lxml==4.9.1
 Markdown==2.6.6
-Pillow==10.2.0
+Pillow==10.3.0
 pymongo==3.3.0
 PyPDF2==1.27.9
 python-frontmatter==0.3.1