Bump notebook from 6.1.1 to 6.4.1

Bumps [notebook](https://github.com/jupyter/jupyterhub) from 6.1.1 to 6.4.1. - [Release notes](https://github.com/jupyter/jupyterhub/releases) - [Changelog](https://github.com/jupyterhub/jupyterhub/blob/main/CHECKLIST-Release.md) - [Commits](https://github.com/jupyter/jupyterhub/commits) --- updated-dependencies: - dependency-name: notebook dependency-type: direct:production ... Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirementsALL.txt

@@ -31,7 +31,7 @@ matplotlib==3.3.0
 model==0.6.0
 newspaper==0.1.0.7
 nltk==3.5
-notebook==6.1.1
+notebook==6.4.1
 numpy==1.19.1
 opencv-python==4.3.0.36
 pandas==1.0.5