[UPDATE] Update ical requirement from >=14.2.0 to >=14.3.0

Updates the requirements on [ical](https://github.com/allenporter/ical) to permit the latest version.
- [Release notes](https://github.com/allenporter/ical/releases)
- [Commits](https://github.com/allenporter/ical/compare/14.2.0...14.3.0)

---
updated-dependencies:
- dependency-name: ical
  dependency-version: 14.3.0
  dependency-type: direct:production
...

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

pyproject.toml

@@ -43,7 +43,7 @@ dependencies = [
     "tomli>=2.4.1,<3.0.0",
     "django-honeypot>=1.3.0,<2",
     "pydantic-extra-types>=2.11.1,<3.0.0",
-    "ical>=14.2.0",
+    "ical>=14.3.0",
     "redis[hiredis]>=8.1.0,<9",
     "environs[django]>=15.2.0,<16",
     "requests>=2.34.2,<3.0.0",