Bump pandas from 1.1.5 to 1.2.0

Bumps [pandas](https://github.com/pandas-dev/pandas) from 1.1.5 to 1.2.0.
- [Release notes](https://github.com/pandas-dev/pandas/releases)
- [Changelog](https://github.com/pandas-dev/pandas/blob/master/RELEASE.md)
- [Commits](pandas-dev/pandas@v1.1.5...v1.2.0)

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

requirements.notebook.txt

@@ -1,5 +1,5 @@
 jupyter-client==6.1.7
 Markdown==3.3.3
 matplotlib==3.3.3
-pandas==1.1.5
+pandas==1.2.0
 papermill==2.2.2