Update dependency org.seleniumhq.selenium:selenium-java to v4.21.0 (#1726)

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

Author: renovate[bot]

examples/kotlin/pom.xml

@@ -20,7 +20,7 @@
         <maven-surefire-plugin.version>3.2.5</maven-surefire-plugin.version>
 
         <java.version>1.8</java.version>
-        <selenium.version>4.20.0</selenium.version>
+        <selenium.version>4.21.0</selenium.version>
 
         <maven.compiler.target>${java.version}</maven.compiler.target>
         <maven.compiler.source>${java.version}</maven.compiler.source>