fix cast from pyproj reprojection

Closes IGNGPF-2354

gpf_pyramide_raster/utils.py

@@ -262,7 +262,7 @@ def get_bbox_from_stored_datas(stored_datas: list[GpfStoredData]) -> list[float]
         project = pyproj.Transformer.from_crs(initial_proj, final_proj, always_xy=True)
         x1, y1 = project.transform(extent.bbox.west, extent.bbox.south)
         x2, y2 = project.transform(extent.bbox.east, extent.bbox.north)
-        bbox = [x1, y1, x2, y2]
+        bbox = [float(x1), float(y1), float(x2), float(y2)]
 
     return bbox