Bump unboundid-ldapsdk from 3.2.1 to 5.1.0 in /core

Bumps [unboundid-ldapsdk](https://github.com/pingidentity/ldapsdk) from 3.2.1 to 5.1.0.
- [Release notes](https://github.com/pingidentity/ldapsdk/releases)
- [Changelog](https://github.com/pingidentity/ldapsdk/blob/master/docs/release-notes.html)
- [Commits](https://github.com/pingidentity/ldapsdk/compare/3.2.1...5.1.0)

Signed-off-by: dependabot[bot] <support@github.com>
Change-Id: Ib314ba97ee2e303a0158855fcfdac8c95b93207f
diff --git a/core/pom.xml b/core/pom.xml
index 8caa289..4e1e670 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -445,7 +445,7 @@
 		<dependency>
 			<groupId>com.unboundid</groupId>
 			<artifactId>unboundid-ldapsdk</artifactId>
-			<version>3.2.1</version>
+			<version>5.1.0</version>
 		</dependency>
 
 		<!-- not part of public release <dependency> <groupId>KorAP-graphDB</groupId>