website: only use maplibre v5 on Maplibre example

[felixpalmer]

Background

Using Maplibre v5 in the website breaks all the examples that are using it, as react-map-gl/maplibre has not yet been updated. Rather than changing all the react-map-gl/maplibre imports to @vis.gl/react-maplibre'; (like in the Maplibre example), this PR only imports the new Maplibre for the example that explicitly needs it. We will follow up and change this to the react-map-gl/maplibre import once v5 is available via that package

Change List

• Add v5 import in example & example as alias
• Reference alias in example

[coveralls]

coverage: 91.636%. remained the same
when pulling 14b5dec on felix/website-maplibre-v5
into 7d046e6 on master.

[ibgreen]

Since this is the last stumbling block for 9.1 release I think it makes sense to do this now and perhaps follow up with a "running" change once any necessary publishing has been done.