fix(deps): update kotlin monorepo to v2.3.20

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

Author: renovate[bot]

build.gradle

@@ -12,7 +12,7 @@
 
 buildscript {
     ext {
-        kotlin_version = '2.3.10'
+        kotlin_version = '2.3.20'
         jacoco_version = '0.8.14'
     }
 }

gradle/verification-metadata.xml

@@ -8281,14 +8281,14 @@
             <sha256 value="38f6f6f24dd05a626c91cc163af4d3867abd50f086767aa64da25f320fa2939b" origin="Generated by Gradle"/>
          </artifact>
       </component>
-       <component group="com.diffplug.spotless" name="spotless-plugin-gradle" version="8.3.0">
-           <artifact name="spotless-plugin-gradle-8.3.0.jar">
-               <sha256 value="ac34f2494c81a1c0ef118afc8c6da482be2bd059146712ac0e7015601d109c09" origin="Generated by Gradle"/>
-           </artifact>
-           <artifact name="spotless-plugin-gradle-8.3.0.module">
-               <sha256 value="7d82b3e83ea54e216353d6754d07a4e22e30433216820eb3930f5cfc1d6d3cf5" origin="Generated by Gradle"/>
-           </artifact>
-       </component>
+      <component group="com.diffplug.spotless" name="spotless-plugin-gradle" version="8.3.0">
+         <artifact name="spotless-plugin-gradle-8.3.0.jar">
+            <sha256 value="ac34f2494c81a1c0ef118afc8c6da482be2bd059146712ac0e7015601d109c09" origin="Generated by Gradle"/>
+         </artifact>
+         <artifact name="spotless-plugin-gradle-8.3.0.module">
+            <sha256 value="7d82b3e83ea54e216353d6754d07a4e22e30433216820eb3930f5cfc1d6d3cf5" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
       <component group="com.fasterxml" name="oss-parent" version="56">
          <artifact name="oss-parent-56.pom">
             <sha256 value="fd491f78857424106d2e3d605bcd799b53d31a565cdc868463ca7e875db45a50" origin="Generated by Gradle"/>