Bump icalendar from 5.0.7 to 5.0.10

Bumps [icalendar](https://github.com/collective/icalendar) from 5.0.7 to 5.0.10.
- [Changelog](https://github.com/collective/icalendar/blob/master/CHANGES.rst)
- [Commits](collective/icalendar@v5.0.7...v5.0.10)

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

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

requirements.txt

@@ -11,6 +11,6 @@ requests==2.31.0
 unidecode==1.3.6
 uvicorn[standard]==0.23.2
 redis==5.0.1
-icalendar == 5.0.7
+icalendar == 5.0.10
 asyncpg==0.28.0
 firebase-admin==6.2.0               # Firebase is used for push notification