CHANGE to temporary artifact action version for supporting ghes

.forgejo/workflows/build.yaml

@@ -30,7 +30,7 @@ jobs:
           ./themes/vitrine/assets/build/images.sh
       - name: Zip output
         run: apt update && apt install zip -y && zip -r public.zip public/
-      - uses: actions/upload-artifact@v4
+      - uses: https://code.forgejo.org/forgejo/upload-artifact@v4 # actions/upload-artifact@v4
         with:
           name: hugo-output
           path: ./public.zip
@@ -42,7 +42,7 @@ jobs:
     container:
       image: node:latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: https://code.forgejo.org/forgejo/download-artifact@v4 # actions/checkout@v4
         with:
           ref: public
       - name: Clean current files in directory