use env

Author: András Kurai

.github/workflows/publish-to-gh-pages.yml

@@ -17,6 +17,10 @@ jobs:
       - name: Build DocFX
         shell: pwsh
         run: ./build.ps1 BuildDocs --unity-email $env:UNITY_EMAIL --unity-password $env:UNITY_PASSWORD --unity-serial $env:UNITY_SERIAL --is-ci 
+        env:
+          UNITY_EMAIL: ${{ secrets.UNITY_EMAIL }}
+          UNITY_PASSWORD: ${{ secrets.UNITY_PASSWORD }}
+          UNITY_SERIAL: ${{ secrets.UNITY_SERIAL }}
 
       - name: Deploy to GitHub Pages
         uses: crazy-max/ghaction-github-pages@v2