update .readthedocs.yml to v2

.readthedocs.yml

@@ -1,5 +1,26 @@
+# .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-22.04
+  tools:
+    python: "3.11"
+  apt_packages:
+    - graphviz
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+  configuration: doc/conf.py
+
+# Install dependencies
 python:
-   version: 3.8
-   pip_install: true
-   extra_requirements:
-      - docs
+  install:
+    - method: pip
+      path: .
+      extra_requirements:
+        - docs