Fix vector tile indices when using tiles served by pygeoapi

[ThorodanBrom]

• Change to /{z}/{y}/{x} which is OGC Tiles spec conformant

Related to issue #192 and geopython/pygeoapi#1989

[ThorodanBrom]

I noticed that the QGIS example is commented out here - https://github.com/geopython/diving-into-pygeoapi/blob/main/workshop/content/docs/publishing/ogcapi-tiles.md?plain=1#L261-L290

When it is uncommented out, those qgis-vtiles-* images in https://github.com/geopython/diving-into-pygeoapi/tree/main/workshop/content/docs/assets/images that have the /{z}/{x}/{y} URL in the Connection options will have to be updated

[doublebyte1]

I noticed that the QGIS example is commented out here - https://github.com/geopython/diving-into-pygeoapi/blob/main/workshop/content/docs/publishing/ogcapi-tiles.md?plain=1#L261-L290

When it is uncommented out, those qgis-vtiles-* images in https://github.com/geopython/diving-into-pygeoapi/tree/main/workshop/content/docs/assets/images that have the /{z}/{x}/{y} URL in the Connection options will have to be updated

Thank You @ThorodanBrom ! I have commented those, because the functionality was broken at the time. I think it is working now. Would you mind regenerating also these screenshots and uncommenting this section? 🙏🏽