third attempt at windows build of gui

.github/workflows/test.yml

@@ -56,7 +56,7 @@ jobs:
         with:
           go-version: 1.18
       - name: Mysys2 setup
-        uses: mysys2/setup-mysys2@v2
+        uses: msys2/setup-msys2@v2
         with:
           install: >-
             git