build(deps): update plotly requirement in the dash-network group

Updates the requirements on [plotly](https://github.com/plotly/plotly.py) to permit the latest version.

Updates `plotly` to 7.0.0
- [Release notes](https://github.com/plotly/plotly.py/releases)
- [Changelog](https://github.com/plotly/plotly.py/blob/main/CHANGELOG.md)
- [Commits](plotly/plotly.py@v6.9.0...v7.0.0)

---
updated-dependencies:
- dependency-name: plotly
  dependency-version: 7.0.0
  dependency-type: direct:production
  dependency-group: dash-network
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,6 +1,6 @@
 # Core scientific stack
 pandas>=1.2.3
-plotly>=6.9.0
+plotly>=7.0.0
 requests>=2.27.1
 retrying
 setuptools