Bump icalendar from 7.1.0 to 7.2.0

Bumps [icalendar](https://github.com/collective/icalendar) from 7.1.0 to 7.2.0.
- [Release notes](https://github.com/collective/icalendar/releases)
- [Changelog](https://github.com/collective/icalendar/blob/main/CHANGES.rst)
- [Commits](collective/icalendar@v7.1.0...v7.2.0)

---
updated-dependencies:
- dependency-name: icalendar
  dependency-version: 7.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pyproject.toml

@@ -33,7 +33,7 @@ dependencies = [
     "django-tables2==2.8.0",
     "django-taggit==6.1.0",
     "django-weasyprint==2.4.0",
-    "icalendar==7.1.0",
+    "icalendar==7.2.0",
     "irc3==1.1.10",
     "lxml==6.1.0",
     "nh3==0.3.5",