deps: update dependency org.freemarker:freemarker to v2.3.34 (#6897)

Author: renovate-bot

dashboard/pom.xml

@@ -36,7 +36,7 @@
     <dependency>
       <groupId>org.freemarker</groupId>
       <artifactId>freemarker</artifactId>
-      <version>2.3.33</version>
+      <version>2.3.34</version>
     </dependency>
     <dependency>
       <!-- required to create PlexusContainer in RepositoryUtility-->