Fix documentation builds (#914)

Dependencies now copied from the poetry config - not great but just could not get it working otherwise.

(cherry picked from commit 5998c9b)

.readthedocs.yaml

@@ -12,16 +12,12 @@ build:
     python: "3.11"
     rust: "1.64"
   jobs:
-    post_create_environment:
-      # Install poetry
-      # https://python-poetry.org/docs/#installing-manually
-      - pip install poetry
-      # Tell poetry to not use a virtual environment
-      - poetry config virtualenvs.create false
     post_install:
-      # Install dependencies with 'docs' dependency group
-      # https://python-poetry.org/docs/managing-dependencies/#dependency-groups
-      - poetry install --with=docs
+      # This is copied from the poetry config - not great but just could not get it working otherwise
+      - pip install sphinx==6.1.3
+      - pip install sphinxcontrib-spelling==8.0.0
+      - pip install sphinx-immaterial==0.11.10
+      - pip install pyenchant==3.2.2
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx:

pyproject.toml

@@ -83,6 +83,7 @@ smtpdfix = "^0.5.1"
 httpx = "^0.24.0"
 
 [tool.poetry.group.docs.dependencies]
+# Also in readthedocs.yaml
 sphinx = "^6.1.3"
 sphinxcontrib-spelling = "^8.0.0"
 sphinx-immaterial = "^0.11.4"