pip: (deps): bump plotly from 6.7.0 to 6.8.0

Bumps [plotly](https://github.com/plotly/plotly.py) from 6.7.0 to 6.8.0.
- [Release notes](https://github.com/plotly/plotly.py/releases)
- [Changelog](https://github.com/plotly/plotly.py/blob/main/CHANGELOG.md)
- [Commits](plotly/plotly.py@v6.7.0...v6.8.0)

---
updated-dependencies:
- dependency-name: plotly
  dependency-version: 6.8.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements-prod.txt

@@ -56,7 +56,7 @@ pathspec==1.1.1
 pbr==7.0.3
 Pillow==12.2.0
 platformdirs==4.10.0
-plotly==6.7.0
+plotly==6.8.0
 pluggy==1.6.0
 pyjwt==2.13.0
 pyparsing==3.3.2