chore(deps): update dependency icalendar to v2.12.2 [security]

Author: renovate[bot]

Gemfile.lock

@@ -201,7 +201,7 @@ GEM
     i18n (1.14.7)
       concurrent-ruby (~> 1.0)
     iban-tools (1.2.1)
-    icalendar (2.12.1)
+    icalendar (2.12.2)
       base64
       ice_cube (~> 0.16)
       logger
@@ -288,7 +288,7 @@ GEM
     notiffany (0.1.3)
       nenv (~> 0.1)
       shellany (~> 0.0)
-    ostruct (0.6.1)
+    ostruct (0.6.3)
     paper_trail (16.0.0)
       activerecord (>= 6.1)
       request_store (~> 1.4)