Update plugin org.jetbrains.kotlin.plugin.compose to v2.0.21

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

app/build.gradle

@@ -28,7 +28,7 @@ buildscript {
 }
 
 plugins {
-    id "org.jetbrains.kotlin.plugin.compose" version "2.0.20"
+    id "org.jetbrains.kotlin.plugin.compose" version "2.0.21"
     id "com.diffplug.spotless" version "6.25.0"
     id "org.jetbrains.kotlin.kapt" version "2.0.21"
     id 'com.google.devtools.ksp' version '2.0.21-1.0.25' apply false

gradle/verification-metadata.xml

@@ -10743,6 +10743,11 @@
             <sha256 value="a9820ac76de5e2c95fbd733fd32d0241044c58ca35702d49be9915780e048ada" origin="Generated by Gradle" reason="Artifact is not signed"/>
          </artifact>
       </component>
+      <component group="org.jetbrains.kotlin.plugin.compose" name="org.jetbrains.kotlin.plugin.compose.gradle.plugin" version="2.0.21">
+         <artifact name="org.jetbrains.kotlin.plugin.compose.gradle.plugin-2.0.21.pom">
+            <sha256 value="f619c327fae9c2249e5199a0f536a49f491157664afad163c8639e740f226d4a" origin="Generated by Gradle" reason="Artifact is not signed"/>
+         </artifact>
+      </component>
       <component group="org.jetbrains.kotlinx" name="atomicfu" version="0.16.1">
          <artifact name="atomicfu-0.16.1.module">
             <sha256 value="fdcf04fc25f6a43f557f341ee0053caa25e759f591169c86566f1dad37fc77a6" origin="Generated by Gradle"/>