Bump dependencies in Kotlin HTTP auth backend example

(cherry picked from commit df76932)

Author: acogoluegnes

deps/rabbitmq_auth_backend_http/examples/rabbitmq_auth_backend_spring_boot_kotlin/pom.xml

@@ -14,16 +14,16 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.1.0.RELEASE</version>
+		<version>2.7.3</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 		<java.version>1.8</java.version>
-		<kotlin.version>1.3.0</kotlin.version>
-		<junit-jupiter.version>5.3.1</junit-jupiter.version>
+		<kotlin.version>1.8.22</kotlin.version>
+		<junit-jupiter.version>5.9.3</junit-jupiter.version>
 	</properties>
 
 	<dependencies>