fix(ci): rtd config (#579)

Properly install environment.

Author: jeertmans

.readthedocs.yaml

@@ -7,11 +7,14 @@ build:
   - libpango1.0-dev
   - ffmpeg
   jobs:
-    post_create_environment:
+    pre_create_environment:
     - asdf plugin add uv
     - asdf install uv latest
     - asdf global uv latest
-    - UV_PROJECT_ENVIRONMENT=$READTHEDOCS_VIRTUALENV_PATH uv sync --group docs --no-dev --no-cache
+    create_environment:
+    - uv venv "${READTHEDOCS_VIRTUALENV_PATH}"
+    install:
+    - UV_PROJECT_ENVIRONMENT="${READTHEDOCS_VIRTUALENV_PATH}" uv sync --frozen --group docs
 sphinx:
   builder: html
   configuration: docs/source/conf.py

pyproject.toml

@@ -16,7 +16,6 @@ docs = [
   "myst-parser>=2.0.0",
   "nbsphinx>=0.9.2",
   "pandoc>=2.3",
-  "pygments<2.19",  # See: https://github.com/ManimCommunity/manim/issues/4104
   "sphinx>=7.0.1",
   "sphinxcontrib-programoutput>=0.18",
   "sphinx-design>=0.6.1",