Bump icalendar from 5.0.9 to 5.0.10

Bumps [icalendar](https://github.com/collective/icalendar) from 5.0.9 to 5.0.10.
- [Changelog](https://github.com/collective/icalendar/blob/master/CHANGES.rst)
- [Commits](collective/icalendar@v5.0.9...v5.0.10)

---
updated-dependencies:
- dependency-name: icalendar
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements/base.txt

@@ -11,6 +11,6 @@ python-postmark==0.6.0
 Markdown==3.4.4
 Pillow==10.0.1
 raven==6.10.0
-icalendar==5.0.9
+icalendar==5.0.10
 requests==2.31.0
 arrow==1.2.3