Fix Read the Docs build errors

.readthedocs.yaml

@@ -0,0 +1,20 @@
+version: 2
+
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.12"
+  jobs:
+    pre_install:
+      # The following code is necessary to avoid PyYAML installation errors.
+      # See https://github.com/yaml/pyyaml/issues/724#issuecomment-1638636728
+      - python -m pip install --upgrade --no-cache-dir --no-build-isolation pyyaml==6.0
+
+sphinx:
+  configuration: docs/conf.py
+
+formats: all
+
+python:
+  install:
+    - requirements: docs/requirements.txt