switch to rtd version 2 config

Author: TimotheeMathieu

.readthedocs.yml

@@ -1,9 +1,22 @@
+# Required
+version: 2
+
+# Set the version of Python and other tools you might need
 build:
-  image: latest
-formats:
-  - none
+  os: ubuntu-22.04
+  tools:
+    python: "3.10"
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+   configuration: docs/conf.py
+
+# If using Sphinx, optionally build your docs in additional formats such as PDF
+# formats:
+#    - pdf
+
+# Optionally declare the Python requirements required to build your docs
 python:
-  pip_install: true
-  extra_requirements:
-    - tests
-    - docs
+   install:
+    - requirements: docs/requirements.txt
+