Update RTD config

.readthedocs.yaml

@@ -1,23 +1,21 @@
-# .readthedocs.yml
-# Read the Docs configuration file
-# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
-
-# Required
 version: 2
 
-# Build documentation in the docs/ directory with Sphinx
+build:
+  os: "ubuntu-22.04"
+  tools:
+    python: "3.12"
+
 sphinx:
-   configuration: docs/source/conf.py
+  configuration: docs/source/conf.py
+  fail_on_warning: true
 
-# Optionally build your docs in additional formats such as PDF
 formats:
-   - pdf
+  - pdf
+  - epub
 
-# Optionally set the version of Python and requirements required to build your docs
 python:
-   version: 3.7
-   install:
-     - method: pip
-       path: .
-       extra_requirements:
-         - docs
+  install:
+    - method: pip
+      path: .
+      exra_requirements:
+        - docs