Update .readthedocs.yml

.readthedocs.yml

@@ -5,21 +5,29 @@
 # Required
 version: 2
 
+
+# Set the OS, Python version and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.12"
+
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
   configuration: docs/conf.py
-#  fail_on_warning: true
+  # Fail on all warnings to avoid broken references
+  # fail_on_warning: true
 
-# Build documentation with MkDocs
-#mkdocs:
-#  configuration: mkdocs.yml
 
 # Optionally build your docs in additional formats such as PDF and ePub
-formats: all
+formats:
+  - pdf
+#   - epub
 
-# Optionally set the version of Python and requirements required to build your docs
+# Optional but recommended, declare the Python requirements required
+# to build your documentation
+# See https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
 python:
-  version: "3.7"
   install:
     - method: setuptools
       path: .