fix build issue 8.0

Author: colbster937

.github/workflows/build.yml

@@ -42,21 +42,18 @@ jobs:
           path: dist/*.AppImage
 
   flatpak:
-    runs-on: ubuntu-latest
     needs: build
-
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/flathub-infra/flatpak-github-actions:gnome-48
+      options: --privileged
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
-        
-      - name: Set up Node.js
-        uses: actions/setup-node@v3
-        with:
-          node-version: 22
-        
-      - name: Build flatpak
+        uses: actions/checkout@v4
+
+      - name: Build Flatpak
         run: |
-          npm run flatpak
+          ./flatpak.sh
 
       - name: Upload Flatpak
         uses: actions/upload-artifact@v4