Update/sync hippo-essentials-dashboard distribution NOTICE and LICENSE files

The dashboard/src/main/appended-resources/LICENSE file needs to be updated:

• many of the packaged 3rd party libraries are of a newer version/copyright year, which should be reflected in the LICENSE file
• the packaged swagger-ui version is (or seems to be) updated to a newer version (ESSENTIALS-1121), but unclear to which one
• there are no more packaged 3rd party libraries under docs/rest-api/lib while the LICENSE file still refers to them
• the packaged hippo-theme version was also bumped to 4.3.2 (ESSENTIALS-1174), copyright year should be updated (also in NOTICE file!)