Bump nbconvert from 6.4.4 to 6.5.1

Bumps [nbconvert](https://github.com/jupyter/nbconvert) from 6.4.4 to 6.5.1.
- [Release notes](https://github.com/jupyter/nbconvert/releases)
- [Commits](jupyter/nbconvert@6.4.4...6.5.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements-notebook.txt

@@ -40,7 +40,7 @@ mistune==0.8.4
 mplfinance==0.12.8b9
 nbclassic==0.3.7
 nbclient==0.5.13
-nbconvert==6.4.4
+nbconvert==6.5.1
 nbformat==5.2.0
 nest-asyncio==1.5.4
 notebook==6.4.12