Update main web display style readme with svwd09.

Author: Andy Townsend

README.md

@@ -9,6 +9,7 @@ and also these in [resources](https://github.com/SomeoneElseOSM/SomeoneElse-vect
 * [SVWD01](https://github.com/SomeoneElseOSM/SomeoneElse-vector-web-display/blob/main/resources/README_svwd01.md), an example web map style.  Visible [here](https://map.atownsend.org.uk/vector/index.html#8/54.031/-1.661)
 * [SVWD06](https://github.com/SomeoneElseOSM/SomeoneElse-vector-web-display/blob/main/resources/README_svwd06.md), based on an example Android Native style.  Visible as a web map [here](https://map.atownsend.org.uk/vector/index_svwd06.html#10/53.995/-1.2908)
 * [SVWD03](https://github.com/SomeoneElseOSM/SomeoneElse-vector-web-display/blob/main/resources/README_svwd03.md), a [Shortbread](https://shortbread-tiles.org/schema/1.0/) map style designed to use [OSMF's minutely updated vector tiles demo](https://community.openstreetmap.org/t/minutely-updated-vector-tiles-demo/110121).  Visible [here](https://map.atownsend.org.uk/vector/index_osmf_shortbread.html).
+* [SVWD09](https://github.com/SomeoneElseOSM/SomeoneElse-vector-web-display/blob/main/resources/README_svwd09.md), like [SVWD03](https://github.com/SomeoneElseOSM/SomeoneElse-vector-web-display/blob/main/resources/README_svwd03.md), but shown on a globe.  Visible [here](https://map.atownsend.org.uk/vector/index_svwd09.html).
 * [SVWD07](https://github.com/SomeoneElseOSM/SomeoneElse-vector-web-display/blob/main/resources/README_svwd07.md), a work-in-progress minimal Shortbread example.
 * [SVWD08](https://github.com/SomeoneElseOSM/SomeoneElse-vector-web-display/blob/main/resources/README_svwd08.md), an experimental "only show roads if you can walk on them" style.  Visible [here](https://map.atownsend.org.uk/vector/index_svwd08.html#8.67/53.9603/-1.6395).
 * [SVWD04](https://github.com/SomeoneElseOSM/SomeoneElse-vector-web-display/blob/main/resources/README_svwd05.md), a debug style for SVWD01.