Update plotly requirement from >=5.19.0 to >=6.9.0 (#5)

Updates the requirements on [plotly](https://github.com/plotly/plotly.py) to permit the latest version.
- [Release notes](https://github.com/plotly/plotly.py/releases)
- [Changelog](https://github.com/plotly/plotly.py/blob/main/CHANGELOG.md)
- [Commits](plotly/plotly.py@v5.19.0...v6.9.0)

---
updated-dependencies:
- dependency-name: plotly
  dependency-version: 6.9.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 streamlit>=1.61.1
-plotly>=5.19.0
+plotly>=6.9.0
 pandas>=2.1.0
 numpy>=1.26.0
 scipy>=1.15.3