Fix viz docstring (#430)

Before:

<img width="312" alt="image"
src="https://github.com/developmentseed/lonboard/assets/15164633/d814e0ab-a4ef-4101-820e-c6eb8c7cc19e">

After:

<img width="335" alt="image"
src="https://github.com/developmentseed/lonboard/assets/15164633/9ecb909d-119f-4a41-a166-aba4d13560be">

Author: kylebarron

lonboard/_viz.py

@@ -111,13 +111,13 @@ def viz(
         data: a data object of any supported type.
 
     Other args:
-        - scatterplot_kwargs: a `dict` of parameters to pass down to all generated
+        scatterplot_kwargs: a `dict` of parameters to pass down to all generated
           [`ScatterplotLayer`][lonboard.ScatterplotLayer]s.
-        - path_kwargs: a `dict` of parameters to pass down to all generated
+        path_kwargs: a `dict` of parameters to pass down to all generated
           [`PathLayer`][lonboard.PathLayer]s.
-        - solid_polygon_kwargs: a `dict` of parameters to pass down to all generated
+        solid_polygon_kwargs: a `dict` of parameters to pass down to all generated
           [`SolidPolygonLayer`][lonboard.SolidPolygonLayer]s.
-        - map_kwargs: a `dict` of parameters to pass down to the generated
+        map_kwargs: a `dict` of parameters to pass down to the generated
           [`Map`][lonboard.Map].
 
     For more control over rendering, construct `Map` and `Layer` objects directly.