Update dependency org.jsoup:jsoup to v1.18.3

Author: renovate[bot]

server/pom.xml

@@ -146,7 +146,7 @@
             <!-- Used to check links in HTML -->
             <groupId>org.jsoup</groupId>
             <artifactId>jsoup</artifactId>
-            <version>1.18.1</version>
+            <version>1.18.3</version>
             <scope>test</scope>
         </dependency>
     </dependencies>