fix(deps): update dependency io.camunda:tasklist-client-example-parent to v8.6.0

Author: renovate[bot]

example/bootstrapping-test/pom.xml

@@ -6,7 +6,7 @@
   <parent>
     <groupId>io.camunda</groupId>
     <artifactId>tasklist-client-example-parent</artifactId>
-    <version>8.6.0-SNAPSHOT</version>
+    <version>8.6.0</version>
   </parent>
 
   <artifactId>bootstrapping-test</artifactId>