chore(deps): bump org.jetbrains.kotlin.android from 1.6.10 to 1.6.21 in /WearOS (#927)

Bumps org.jetbrains.kotlin.android from 1.6.10 to 1.6.21.


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WearOS/build.gradle

@@ -17,5 +17,5 @@
 plugins {
     id 'com.android.application' version '7.1.2' apply false
     id 'com.google.android.libraries.mapsplatform.secrets-gradle-plugin' version '2.0.1' apply false
-    id 'org.jetbrains.kotlin.android' version '1.6.10' apply false
+    id 'org.jetbrains.kotlin.android' version '1.6.21' apply false
 }