Updates .readthedocs.yaml

.readthedocs.yaml

@@ -1,7 +1,18 @@
 version: 2
 
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+   configuration: content/conf.py
+
+# Optionally build your docs in additional formats such as PDF
+formats: all
+
+# Optionally set the version of Python and requirements required to build your docs
 python:
+  version: "3.7"
   install:
   - requirements: docs/requirements.txt
 
-formats: all
+submodules:
+  include: all
+  recursive: true