Upgrade to Unboundid Ldapsdk 4.0.9

Closes gh-15243

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -179,7 +179,7 @@
 		<thymeleaf-extras-data-attribute.version>2.0.1</thymeleaf-extras-data-attribute.version>
 		<thymeleaf-extras-java8time.version>3.0.1.RELEASE</thymeleaf-extras-java8time.version>
 		<tomcat.version>8.5.35</tomcat.version>
-		<unboundid-ldapsdk.version>4.0.8</unboundid-ldapsdk.version>
+		<unboundid-ldapsdk.version>4.0.9</unboundid-ldapsdk.version>
 		<undertow.version>1.4.26.Final</undertow.version>
 		<webjars-hal-browser.version>3325375</webjars-hal-browser.version>
 		<webjars-locator-core.version>0.35</webjars-locator-core.version>