Enable Windows CI for Marble so it can keep watch over the ability for Marble...

Enable Windows CI for Marble so it can keep watch over the ability for Marble to build on Windows (which other projects depend on).

Ref T12071

local-metadata/product-definitions.yaml

@@ -97,6 +97,7 @@
       - "kde/kdeedu/kmplot"
       - "kde/kdeedu/kturtle"
       - "kde/kdeedu/kwordquiz"
+      - "kde/kdeedu/marble"
       - "kde/kdeedu/minuet"
       - "kde/kdeedu/parley"
       - "kde/kdegraphics/libs/libkexiv2"