Update dependency io.jenkins.plugins:echarts-api to v5.6.0-4

Author: renovate[bot]

war/pom.xml

@@ -368,7 +368,7 @@ THE SOFTWARE.
                   <!-- dependency of junit -->
                   <groupId>io.jenkins.plugins</groupId>
                   <artifactId>echarts-api</artifactId>
-                  <version>5.6.0-3</version>
+                  <version>5.6.0-4</version>
                   <type>hpi</type>
                 </artifactItem>
                 <artifactItem>