trying pwsh env syntax...'cause you know....it is a pwsh shell

.github/workflows/build.yml

@@ -41,11 +41,11 @@ jobs:
         run: |
           $env:pkgVersion = (Get-Content -Raw -Path .\package.json | ConvertFrom-Json).version
           echo "{PACKAGE_VERSION}={$env:pkgVersion}" | Out-File -FilePath $env:GITHUB_ENV -Encoding utf8 -Append
-          echo "version: $pkgVersion"
+          echo "version: $env:pkgVersion"
 
       - name: test setting env var
         run: |
-          echo "version: $PACKAGE_VERSION"
+          echo "version: $env:PACKAGE_VERSION"
           
           if($PACKAGE_VERSION -eq "") {
             Throw "test env failed."