update .readthedocs.yaml

.readthedocs.yaml

@@ -6,9 +6,8 @@
 version: 2
 
 # Build documentation in the docs/ directory with Sphinx
-sphinx:
-  configuration: docs/source/conf.py
-  fail_on_warning: false
+mkdocs:
+  configuration: mkdocs.yml
 
 # Optionally set the version of Python and requirements required to build your docs
 python:
@@ -17,5 +16,3 @@ python:
     - requirements: docs/requirements.txt
     - method: pip
       path: .
-      extra_requirements:
-        - docs