chore: revert release actions

Author: wasabeef

.github/workflows/release.yml

@@ -64,7 +64,7 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v3
         with:
           name: sha256
           path: packages/command/bin/${{ matrix.target }}/fluttergen-${{ matrix.artifact_prefix }}.sha256
@@ -94,7 +94,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: build
     steps:
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v3
         with:
           name: sha256