Fix readthedocs file

.readthedocs.yml

@@ -1,12 +1,19 @@
-# .readthedocs.yml
-# Read the Docs configuration file
+# Read the Docs configuration file for Sphinx projects
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
 
 # Required
 version: 2
 
-# Optionally set the version of Python and requirements required to build your docs
+# Set the OS, Python version and other tools you might need
+build:
+    os: ubuntu-22.04
+    tools:
+        python: "3.10"
+
 python:
-   version: 3.7
-   install:
-      - requirements: docs/requirements.txt
+    install:
+        - requirements: docs/requirements.txt
+
+# Build documentation in the "docs/" directory with Sphinx
+sphinx:
+  configuration: docs/source/conf.py

docs/requirements.txt

@@ -4,3 +4,4 @@ ruamel.yaml
 ipykernel
 nbsphinx
 nbsphinx_link
+sphinx_rtd_theme