Remove windows-2019 from GitHub workflow [ci skip]

Author: martinmoene

.github/workflows/ci.yml

@@ -84,7 +84,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [windows-2019, windows-2022]
+        os: [windows-2022]
 
     runs-on: ${{ matrix.os }}