[vale] reported by reviewdog 🐶 [Vaadin.HeadingCase] 'Synchronizing UI state between server and client' should be in title case. Raw Output: {"message": "[Vaadin.HeadingCase] 'Synchronizing UI state between server and client' should be in title case.", "location": {"path": "articles/flow/advanced/server-client-communication.adoc", "range": {"start": {"line": 7, "column": 3}}}, "severity": "WARNING"}