Fix heatmap creation

Author: gjmooney

python/jupytergis_lab/jupytergis_lab/notebook/gis_document.py

@@ -540,12 +540,12 @@ def add_heatmap_layer(
             "visible": True,
             "parameters": {
                 "source": source_id,
-                "type": type,
                 "color": gradient,
                 "opacity": opacity,
                 "blur": blur,
                 "radius": radius,
                 "feature": feature,
+                "symbologyState": {"renderType": "Heatmap"},
             },
         }