ci: remove deprecated windows-2019 build

Author: dr-orlovsky

.github/workflows/build.yml

@@ -48,7 +48,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-22.04, ubuntu-latest, macos-13, macos-latest, windows-2019, windows-latest ]
+        os: [ ubuntu-22.04, ubuntu-latest, macos-13, macos-latest, windows-2022, windows-latest ]
     steps:
       - uses: ilammy/setup-nasm@v1
       - uses: actions/checkout@v4