pin plotly.py version

version 6.0.0 changed how dataframes are accessed (plotly/plotly.py#4790) which (I think) is breaking how django-dashboards reads dataframes

Author: lsmoker

setup.cfg

@@ -33,7 +33,7 @@ install_requires =
     django-cors-headers
     django-asset-definitions
     pandas
-    plotly
+    plotly == 5.24.1
     typing_extensions  # required for 3.9 support atm
 
 [tool:pytest]