Use windows-2019 for build

Author: adarshyoga

.github/workflows/conda-package.yml

@@ -33,7 +33,7 @@ jobs:
       fail-fast: false
       matrix:
         python: ['3.9', '3.10', '3.11']
-        os: [ubuntu-latest, windows-latest]
+        os: [ubuntu-latest, windows-2019]
 
     runs-on: ${{ matrix.os }}