🚧 rollback to v3 of actions/upload-artifact

waiting for https://codeberg.org/forgejo/forgejo/issues/3485 to be fixed

.forgejo/workflows/test.yml

@@ -12,16 +12,22 @@ jobs:
       - name: Download OSM data
         run: curl -o luxembourg-latest.osm.pbf https://download.geofabrik.de/europe/luxembourg-latest.osm.pbf
 
+      - name: Convert OSM data to .osm
+        run: |
+          apt update && \
+          apt install -y osmctools && \
+          osmconvert luxembourg-latest.osm.pbf -o=luxembourg-latest.osm
+
       - name: Run Shape Generation
-        uses: gtfs-actions/generate-shapes@v1
+        uses: gtfs-actions/generate-shapes@main
         with:
           gtfs_file: sample-feed.zip
-          osm_file: luxembourg-latest.osm.pbf
+          osm_file: luxembourg-latest.osm
           mot: bus
           output_file: modified-feed.zip
 
       - name: Upload modified feed
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v3
         with:
           name: modified-feed
           path: modified-feed.zip