Merge pull request #13904 from rabbitmq/dependabot/maven/deps/rabbitmq_auth_backend_http/examples/rabbitmq_auth_backend_spring_boot_kotlin/v3.13.x/dev-deps-5ac378ddf0

[skip ci] Bump the dev-deps group across 1 directory with 2 updates

Author: michaelklishin

deps/rabbitmq_auth_backend_http/examples/rabbitmq_auth_backend_spring_boot_kotlin/pom.xml

@@ -23,7 +23,7 @@
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 		<maven.compiler.source>17</maven.compiler.source>
 		<maven.compiler.target>17</maven.compiler.target>
-		<kotlin.version>2.1.20</kotlin.version>
+		<kotlin.version>2.1.21</kotlin.version>
 		<junit-jupiter.version>5.10.0</junit-jupiter.version>
 	</properties>