Update doc build dependencies

Author: marthacryan

Diff for: doc/requirements.txt

@@ -1,5 +1,6 @@
 plotly==6.0.1
 jupytext==1.16.4
+jupyter-client<7
 jupyter
 notebook
 pandas==1.4.0
@@ -36,7 +37,7 @@ kaleido
 umap-learn==0.5.1
 pooch
 wget
-nbconvert>=6.4.4
+nbconvert==5.6.1
 orjson
 dash-bio
 jinja2<3.1