(d) modify build workflow for testing

Author: per1234

.github/workflows/build.yml

@@ -55,7 +55,7 @@ env:
     - config:
         # Human identifier for the job.
         name: Windows
-        runs-on: [self-hosted, windows-sign-pc]
+        runs-on: windows-2019
         # The value is a string representing a JSON document.
         # Setting this to null causes the job to run directly in the runner machine instead of in a container.
         container: |
@@ -76,7 +76,6 @@ env:
         # otherwise paths in the build job will be too long for `light.exe`
         # we use the below as a Symbolic link (just changing the wd will break the checkout action)
         # this is a work around (see: https://github.com/actions/checkout/issues/197).
-        working-directory: 'C:\a'
       artifacts:
         - path: '*Windows_64bit.exe'
           name: Windows_X86-64_interactive_installer