docs: Fix readthedocs generation (#10)

Author: keelerm84

.readthedocs.yml

@@ -3,13 +3,12 @@ version: 2
 build:
   os: "ubuntu-22.04"
   tools:
-    python: "3.10"
+    python: "3.12"
   jobs:
     post_create_environment:
-      - pip install poetry
-      - poetry config virtualenvs.create false
+      - python -m pip install poetry
     post_install:
-      - poetry install --with docs
+      - VIRTUAL_ENV=$READTHEDOCS_VIRTUALENV_PATH poetry install --with docs
 
 sphinx:
   builder: html