Downgrade artifact actions to v3 for Gitea compatibility

.github/workflows/release.yml

@@ -31,7 +31,7 @@ jobs:
     - name: upload to pypi
       uses: pypa/gh-action-pypi-publish@release/v1
     - name: Upload artifact
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v3
       with:
         name: gotify_tray-${{github.ref_name}}-py3-none-any.whl
         path: dist/gotify_tray-${{github.ref_name}}-py3-none-any.whl
@@ -41,7 +41,7 @@ jobs:
     needs: [pypi]
     steps:
     - uses: actions/checkout@v4
-    - uses: actions/download-artifact@v4
+    - uses: actions/download-artifact@v3
     - name: Release
       uses: marvinpinto/action-automatic-releases@latest
       with: