Bump unboundid-ldapsdk from 5.1.0 to 5.1.1 in /core

Bumps [unboundid-ldapsdk](https://github.com/pingidentity/ldapsdk) from 5.1.0 to 5.1.1.
- [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/5.1.0...5.1.1)

Signed-off-by: dependabot[bot] <support@github.com>

Closes #103

Change-Id: I5faf64ce2a9abc8c9fb0207d06508c829feee421
diff --git a/core/pom.xml b/core/pom.xml
index 0ec909b..9f19248 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -445,7 +445,7 @@
 		<dependency>
 			<groupId>com.unboundid</groupId>
 			<artifactId>unboundid-ldapsdk</artifactId>
-			<version>5.1.0</version>
+			<version>5.1.1</version>
 		</dependency>
 
 		<!-- not part of public release <dependency> <groupId>KorAP-graphDB</groupId>