Bump ical4j from 1.0.6 to 1.0.8

Bumps [ical4j](https://github.com/ical4j/ical4j) from 1.0.6 to 1.0.8.
- [Release notes](https://github.com/ical4j/ical4j/releases)
- [Changelog](https://github.com/ical4j/ical4j/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/ical4j/ical4j/compare/ical4j-1.0.6...ical4j-1.0.8)

---
updated-dependencies:
- dependency-name: org.mnode.ical4j:ical4j
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle

@@ -317,7 +317,7 @@ dependencies {
     implementation "io.noties:prism4j:$prismVersion"
     kapt "io.noties:prism4j-bundler:$prismVersion"
 
-    implementation ('org.mnode.ical4j:ical4j:1.0.6') {
+    implementation ('org.mnode.ical4j:ical4j:1.0.8') {
         ['org.apache.commons','commons-logging'].each {
             exclude group: "$it"
         }