Bump nbdime from 3.1.1 to 4.0.1

Bumps [nbdime](https://github.com/jupyter/nbdime) from 3.1.1 to 4.0.1.
- [Release notes](https://github.com/jupyter/nbdime/releases)
- [Commits](jupyter/nbdime@3.1.1...4.0.1)

environment.yml

@@ -42,7 +42,7 @@ dependencies:
   - jupyter-book~=0.15.1
   - jupytext==1.14.1
   - nbconvert==6.5.3
-  - nbdime==3.1.1
+  - nbdime~=4.0.1
 
   # Core scientific python stack
   - cython==0.29.32 # optimization, C API access