build(deps): bump icalendar from 2.10.2 to 2.10.3

Bumps [icalendar](https://github.com/icalendar/icalendar) from 2.10.2 to 2.10.3.
- [Changelog](https://github.com/icalendar/icalendar/blob/main/CHANGELOG.md)
- [Commits](icalendar/icalendar@v2.10.2...v2.10.3)

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

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

Gemfile.lock

@@ -303,8 +303,9 @@ GEM
       multi_xml (>= 0.5.2)
     i18n (1.14.6)
       concurrent-ruby (~> 1.0)
-    icalendar (2.10.2)
+    icalendar (2.10.3)
       ice_cube (~> 0.16)
+      ostruct
     ice_cube (0.17.0)
     ice_nine (0.11.2)
     image_processing (1.13.0)
@@ -438,6 +439,7 @@ GEM
       capybara (>= 1.1)
       rspec (>= 2.14)
     orm_adapter (0.5.0)
+    ostruct (0.6.1)
     paper_trail (15.2.0)
       activerecord (>= 6.1)
       request_store (~> 1.4)