Disable deprecated windows 2019 runner

  hcs::CreateComputeSystem
  c12e839a7b928b6464c68df35ff3a006bca17060fb69bc07aafe2737dcf12175: The
  container operating system does not match the host operating system.
  make: *** [Makefile:62: image] Error 1

Signed-off-by: Kentaro Hayashi <hayashi@clear-code.com>

Author: kenhys

.github/workflows/windows.yml

@@ -14,8 +14,9 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - version: v1.19
-            os-version: 2019
+          # Even though dropped from GitHub Actions, but LTSC2019 itself is still maintained
+          # - version: v1.19
+          #   os-version: 2019
           - version: v1.19
             os-version: 2022
     runs-on: windows-${{ matrix.os-version }}