chore(deps): update camunda/web-modeler docker tag to v8.6.6

Author: renovate[bot]

.env

@@ -18,7 +18,7 @@ CAMUNDA_TASKLIST_VERSION=8.6.6
 CAMUNDA_OPTIMIZE_VERSION=8.6.3
 
 # renovate: datasource=docker depName=camunda/web-modeler lookupName=registry.camunda.cloud/web-modeler-ee/modeler-restapi
-CAMUNDA_WEB_MODELER_VERSION=8.6.5
+CAMUNDA_WEB_MODELER_VERSION=8.6.6
 # renovate: datasource=docker depName=elasticsearch
 ELASTIC_VERSION=8.17.0
 KEYCLOAK_SERVER_VERSION=24.0.5