Bump notebook from 5.5.0 to 6.4.12

Bumps [notebook](http://jupyter.org) from 5.5.0 to 6.4.12.

---
updated-dependencies:
- dependency-name: notebook
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -22,7 +22,7 @@ MarkupSafe==1.0
 mistune==0.8.3
 nbconvert==5.3.1
 nbformat==4.4.0
-notebook==5.5.0
+notebook==6.4.12
 numpy==1.22.0
 pandas==0.23.1
 pandocfilters==1.4.2