the page "Getting started > Qdrant Web UI" didn't say how to install web ui if someone build from source

I found the solution from github issue https://github.com/qdrant/qdrant/issues/6691#issuecomment-2973635532
so just tell people who build from source use https://github.com/qdrant/qdrant/blob/master/tools/sync-web-ui.sh in the page "Getting started > Qdrant Web UI" 