Fix windows CI

Author: GuillaumeGomez

.github/workflows/windows.yml

@@ -10,11 +10,11 @@ jobs:
 
   gvsbuild:
     name: build GTK binaries with gvsbuild
-    runs-on: windows-latest
+    runs-on: windows-2019
 
     env:
       # git revision of gvsbuild we use for to build GTK and the other dependencies
-      gvsbuildref: ce4c9de92dc3487d15b8f5ecc200705f951b6ae8
+      gvsbuildref: 861244f84a04da49172c23646d9e23885094cab4
 
       # bump this number if you want to force a rebuild of gvsbuild with the same revision
       gvsbuildupdate: 1
@@ -64,7 +64,7 @@ jobs:
 
   build:
     name: build gtk-rs on Windows
-    runs-on: windows-latest
+    runs-on: windows-2019
     needs: gvsbuild
 
     strategy: