ci: remove SITE_BASE_URL

Author: MistEO

.github/workflows/gh-website-pages.yml

@@ -28,7 +28,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     env:
-      SITE_BASE_URL: /${{ github.event.repository.name }}/
+      # SITE_BASE_URL: /${{ github.event.repository.name }}/
       SITE_URL: https://${{ github.repository_owner }}.github.io/${{ github.event.repository.name }}/
     steps:
       - name: Checkout