MAINT: Bump the documentation group with 1 update (#2899)

Bumps the documentation group with 1 update: [plotly](https://github.com/plotly/plotly.py).


Updates `plotly` from 5.19.0 to 5.20.0
- [Release notes](https://github.com/plotly/plotly.py/releases)
- [Changelog](https://github.com/plotly/plotly.py/blob/master/CHANGELOG.md)
- [Commits](plotly/plotly.py@v5.19.0...v5.20.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

pyproject.toml

@@ -90,7 +90,7 @@ doc = [
     "matplotlib==3.8.3",
     "numpydoc==1.6.0",
     "pandas==2.2.1",
-    "plotly==5.19.0",
+    "plotly==5.20.0",
     "pyiges[full]==0.3.1",
     "pypandoc==1.13",
     "pytest-sphinx==0.6.0",