add Java-WebSocket to deps to the ridljar/libreoffice pom

The dependency was introduced in
8e246331f6 but never was added to the
maven pom

Change-Id: Id12036c82ecf803a817054a618316a95a4c738ae
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/181240
Tested-by: Jenkins
Reviewed-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>

download.lst

@@ -360,6 +360,7 @@ ICU_DATA_TARBALL := icu4c-77_1-data.zip
 # so that git cherry-pick
 # will not run into conflicts
 JAVA_WEBSOCKET_SHA256SUM := f3ce29efde338707241d47ab4784b19a1e3658bfa0564b5bc5f80c27e5118728
+# please also adjust the version in ridljar/pom.libreoffice.xml
 JAVA_WEBSOCKET_TARBALL := Java-WebSocket-1.6.0.tar.gz
 # three static lines
 # so that git cherry-pick

ridljar/pom.libreoffice.xml

@@ -8,6 +8,16 @@
   <description>Public UNO Java Classes (formerly jurt,juh,ridl,unoil)</description>
   <url>https://www.libreoffice.org</url>
 
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>org.java-websocket</groupId>
+        <artifactId>Java-WebSocket</artifactId>
+        <version>1.6.0</version>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+
   <licenses>
     <license>
       <name>Mozilla Public License, Version 2.0</name>