make test.yaml test job depend on linux job

The latter builds and caches CPython for the former to use, which is important
because we don't currently support building CPython on Windows.

Signed-off-by: Joel Dice <joel.dice@fermyon.com>

Author: dicej

.github/workflows/test.yaml

@@ -69,6 +69,7 @@ jobs:
 
   test:
     name: Test
+    needs: linux
     strategy:
       fail-fast: false
       matrix: