ci: different env approach

.github/workflows/ci.yml

@@ -17,16 +17,15 @@ jobs:
     # See: https://docs.github.com/en/actions/configuring-and-managing-workflows/configuring-a-workflow#configuring-a-build-matrix
     runs-on: windows-latest
 
+    env:
+      PKGNAME: Olive-${GITHUB_SHA:8}-Windows-x86_64
+
     steps:
-    - uses: actions/checkout@v2
-      
-    - name: Generate Package Name
-      id: vars
-      run: echo '::set-env name=PKGNAME::Olive-${env.GITHUB_SHA::8}-Windows-x86_64'
-      
     - name: Test package name
       shell: cmd
       run: echo 'Package name is' %PKGNAME%
+      
+    - uses: actions/checkout@v2
 
     - name: Create Build Environment
       # Some projects don't allow in-source building, so create a separate build directory