fix: testing project generation.

Author: paulhazen

.github/workflows/generate-unity-project-files.yml

@@ -24,7 +24,7 @@ jobs:
       - name: Build project
         uses: game-ci/unity-builder@v4
         env:
-          UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
+          UNITY_SERIAL: ${{ secrets.UNITY_SERIAL }}
           UNITY_EMAIL: ${{ secrets.UNITY_EMAIL }}
           UNITY_PASSWORD: ${{ secrets.UNITY_PASSWORD }}
         with: