Fix Quiz dark mode #810

Job	Run time
Build-environments (jupyter-book/introduction/analysis_tools.yml)	36s
Build-environments (jupyter-book/preprocessing_visualization/preprocessing.yml)	1m 7s
Build-environments (jupyter-book/cellular_structure/clustering.yml)	44s
Build-environments (jupyter-book/cellular_structure/annotation.yml)	2m 24s
Build-environments (jupyter-book/cellular_structure/integration.yml)	1m 20s
Build-environments (jupyter-book/conditions/compositional.yml)	2m 32s
Build-environments (jupyter-book/conditions/gsea_pathway.yml)	1m 1s
Build-environments (jupyter-book/conditions/perturbation_modeling.yml)	3m 2s
Build-environments (jupyter-book/conditions/differential_gene_expression.yml)	2m 44s
Build-environments (jupyter-book/trajectories/lineage_tracing.yml)	1m 34s
Build-environments (jupyter-book/trajectories/pseudotemporal.yml)	35s
Build-environments (jupyter-book/mechanisms/cell_cell_communication.yml)	1m 10s
Build-environments (jupyter-book/spatial/spatial.yml)	16m 5s
Build-environments (jupyter-book/surface_protein/surface_protein.yml)	35s
Build-environments (jupyter-book/multimodal_integration/paired_integration.yml)	2m 38s
Build-environments (jupyter-book/multimodal_integration/advanced_integration.yml)	2m 56s
	41m 3s

Provide feedback