PR #128 fix pandas-Bokeh error ch6

fixed d.plot() issue by downgrading bokeh to 2.4.3

Author: justb4

binder/environment.yml

@@ -13,7 +13,7 @@ dependencies:
   - pygeometa
   - folium
   - owslib
-  - bokeh
+  - bokeh=2.4.3
   - ipyleaflet
   - matplotlib
   - pip