fix: upgrade org.apache.httpcomponents:httpcore from 4.4.5 to 4.4.15

Snyk has created this PR to upgrade org.apache.httpcomponents:httpcore from 4.4.5 to 4.4.15.

See this package in Maven Repository:
https://mvnrepository.com/artifact/org.apache.httpcomponents/httpcore/

See this project in Snyk:
https://app.snyk.io/org/janssenproject/project/2bbb3fed-4aad-4dee-b3dc-5be0d167dcb7?utm_source=github&utm_medium=referral&page=upgrade-pr

jans-auth-server/server/integrations.deprecatred/toopher/sdk/pom.xml

@@ -83,7 +83,7 @@
         <dependency>
             <groupId>org.apache.httpcomponents</groupId>
             <artifactId>httpcore</artifactId>
-            <version>4.4.5</version>
+            <version>4.4.15</version>
         </dependency>
         <dependency>
             <groupId>org.codehaus.jettison</groupId>