fix: drop strictness

Signed-off-by: Henry Schreiner <henryfs@princeton.edu>

Author: henryiii

pixi.toml

@@ -26,5 +26,5 @@ rich = ">=11"
 
 [tasks]
 lab = "jupyter lab"
-book = "python -m ipykernel install --user --name conda-env-level-up-your-python-py && jupyter-book build --execute --strict"
-pdf = "python -m ipykernel install --user --name conda-env-level-up-your-python-py && jupyter-book build --pdf --execute --strict"
+book = "python -m ipykernel install --user --name conda-env-level-up-your-python-py && jupyter-book build --execute"
+pdf = "python -m ipykernel install --user --name conda-env-level-up-your-python-py && jupyter-book build --pdf --execute"