update rtd (#6)

Co-authored-by: Boisselet Alexandre (IFAT DC ATV SC D TE2) <[email protected]>

readthedocs.yml

@@ -1,8 +1,32 @@
+# .readthedocs.yaml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
 version: 2
+
+# Set the version of Python and other tools you might need
+build:
+  os: ubuntu-20.04
+  tools:
+    python: "3.9"
+    # You can also specify other tool versions:
+    # nodejs: "16"
+    # rust: "1.55"
+    # golang: "1.17"
+
+# 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:
-  version: 3
   install:
-      - method: pip
-        path: .
-        extra_requirements:
-          - docs
+    - method: pip
+      path: .
+      extra_requirements:
+        - docs