Fix a moved descriptor path in view controller in Jmix docs

[SergeiAksenov2]

Please add information about view descriptor path in annotation @ViewDescriptor in view controller to Jmix docs.

Url: https://docs.jmix.ru/jmix/flow-ui/views/view-annotations.html

The path should start with "/" and should contain full descriptor path in the project, like this: "/com/company/project/view/tomove/new-entity-list-view.xml"