Bump plotly from 5.18.0 to 5.19.0 in /requirements

Bumps [plotly](https://github.com/plotly/plotly.py) from 5.18.0 to 5.19.0.
- [Release notes](https://github.com/plotly/plotly.py/releases)
- [Changelog](https://github.com/plotly/plotly.py/blob/master/CHANGELOG.md)
- [Commits](plotly/plotly.py@v5.18.0...v5.19.0)

---
updated-dependencies:
- dependency-name: plotly
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements/requirements_doc.txt

@@ -13,7 +13,7 @@ numpy==1.26.3
 numpydoc==1.6.0
 pandas==2.2.0
 panel==1.3.8
-plotly==5.18.0
+plotly==5.19.0
 pypandoc==1.12
 pytest-sphinx==0.6.0
 pythreejs==2.4.2