Update .readthedocs.yml

Author: tommyod

.readthedocs.yml

@@ -1,6 +1,16 @@
+# Required
+version: 2
+
 build:
-  image: latest
+  os: ubuntu-20.04
+  tools:
+    python: "3.11"
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+   configuration: docs/conf.py
 
 python:
-  version: 3.8
-  setup_py_install: true
+  install:
+    - requirements: requirements.txt
+    - method: pip