chore(deps): bump github.com/arran4/golang-ical from 0.2.1 to 0.2.4

Bumps [github.com/arran4/golang-ical](https://github.com/arran4/golang-ical) from 0.2.1 to 0.2.4.
- [Release notes](https://github.com/arran4/golang-ical/releases)
- [Commits](arran4/golang-ical@v0.2.1...v0.2.4)

---
updated-dependencies:
- dependency-name: github.com/arran4/golang-ical
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

go.mod

@@ -3,7 +3,7 @@ module github.com/traPtitech/knoQ
 go 1.20
 
 require (
-	github.com/arran4/golang-ical v0.2.1
+	github.com/arran4/golang-ical v0.2.4
 	github.com/go-gormigrate/gormigrate/v2 v2.1.1
 	github.com/go-sql-driver/mysql v1.7.1
 	github.com/gofrs/uuid v4.4.0+incompatible

go.sum

@@ -11,8 +11,8 @@ github.com/Microsoft/go-winio v0.6.0 h1:slsWYD/zyx7lCXoZVlvQrj0hPTM1HI4+v1sIda2y
 github.com/Microsoft/go-winio v0.6.0/go.mod h1:cTAf44im0RAYeL23bpB+fzCyDH2MJiz2BO69KH/soAE=
 github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5 h1:TngWCqHvy9oXAN6lEVMRuU21PR1EtLVZJmdB18Gu3Rw=
 github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5/go.mod h1:lmUJ/7eu/Q8D7ML55dXQrVaamCz2vxCfdQBasLZfHKk=
-github.com/arran4/golang-ical v0.2.1 h1:7gSJYzMu4milwosbHNxi3mQZHiTWny9A7B8XH4rmx+w=
-github.com/arran4/golang-ical v0.2.1/go.mod h1:RqMuPGmwRRwjkb07hmm+JBqcWa1vF1LvVmPtSZN2OhQ=
+github.com/arran4/golang-ical v0.2.4 h1:0/rTXn2qqEekLKec3SzRRy+z7pCLtniMb0KD/dPogUo=
+github.com/arran4/golang-ical v0.2.4/go.mod h1:RqMuPGmwRRwjkb07hmm+JBqcWa1vF1LvVmPtSZN2OhQ=
 github.com/cenkalti/backoff/v4 v4.1.3 h1:cFAlzYUlVYDysBEH2T5hyJZMh3+5+WCBvSnK6Q8UtC4=
 github.com/cenkalti/backoff/v4 v4.1.3/go.mod h1:scbssz8iZGpm3xbr14ovlUdkxfGXNInqkPWOWmG2CLw=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=