fix(deps): update dependency org.mnode.ical4j:ical4j to v4

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -41,7 +41,7 @@ flexboxVersion = "3.0.0"
 fragmentKtxVersion = "1.8.9"
 glide = "5.0.5"
 gsonVersion = "2.13.2"
-ical4jVersion = "3.2.19"
+ical4jVersion = "4.2.1"
 jackrabbitWebdavVersion = "2.13.5"
 jacoco = "0.8.14"
 jsonVersion = "20250517"

gradle/verification-metadata.xml

@@ -17,6 +17,9 @@
          <trust file=".*-javadoc[.]jar" regex="true" reason="Android Studio downloads javadoc jars but doesn't add checksums - fixes building in AS"/>
          <trust file=".*-sources[.]jar" regex="true" reason="Android Studio downloads source jars but doesn't add checksums - fixes building in AS"/>
       </trusted-artifacts>
+      <ignored-keys>
+         <ignored-key id="72385FF0AF338D52" reason="Key couldn't be downloaded from any key server"/>
+      </ignored-keys>
       <trusted-keys>
          <trusted-key id="015479E1055341431B4545AB72475FD306B9CAB7" group="com.googlecode.javaewah" name="JavaEWAH" version="1.2.3"/>
          <trusted-key id="03C123038C20AAE9E286C857479D601F3A7B5C1A" group="^com[.]github[.]ajalt($|([.].*))" regex="true"/>
@@ -164,6 +167,7 @@
          <trusted-key id="3F2A008A91D11A7FAC4A0786F13D3E721D56BD54" group="org.reflections" name="reflections" version="0.10.2"/>
          <trusted-key id="4021EEEAFF5DE8404DCD0A270AA3E5C3D232E79B" group="jakarta.inject" name="jakarta.inject-api" version="2.0.1"/>
          <trusted-key id="41CD49B4EF5876F9E9F691DABAC30622339994C4" group="org.jspecify" name="jspecify" version="1.0.0"/>
+         <trusted-key id="44C9BD32E7CB72F36F49DD0716968D251E760606" group="org.mnode.ical4j" name="ical4j" version="4.2.1"/>
          <trusted-key id="44F4797A52C336FA666CD9271DE461528F1F1B2A" group="org.apache.jackrabbit"/>
          <trusted-key id="44FBDBBC1A00FE414F1C1873586654072EAD6677" group="org.sonatype.oss" name="oss-parent" version="9"/>
          <trusted-key id="453EA31328DE7D8AAA55AD4ED56C721C1CFF1424" group="^com[.]twelvemonkeys($|([.].*))" regex="true"/>
@@ -33518,6 +33522,14 @@
             <sha256 value="0fe31326e83b7622cbcd9c75d467b291f01ffe3cc6e3e76651ac05a1c1c7a360" origin="Generated by Gradle"/>
          </artifact>
       </component>
+      <component group="org.threeten" name="threeten-extra" version="1.8.0">
+         <artifact name="threeten-extra-1.8.0.jar">
+            <sha256 value="51e4d21edc4e9447f7760c050e0baee75d7d973f387ba605a17abdc4d24fd6d8" origin="Generated by Gradle" reason="A key couldn't be downloaded"/>
+         </artifact>
+         <artifact name="threeten-extra-1.8.0.pom">
+            <sha256 value="a5d8cdf2592bda1ef405965883db2da431b267c76de300d075821e20f6dc0c7d" origin="Generated by Gradle" reason="A key couldn't be downloaded"/>
+         </artifact>
+      </component>
       <component group="org.tukaani" name="xz" version="1.9">
          <artifact name="xz-1.9.jar">
             <sha256 value="211b306cfc44f8f96df3a0a3ddaf75ba8c5289eed77d60d72f889bb855f535e5" origin="Generated by Gradle"/>