Bump ipywidgets from 8.1.1 to 8.1.2

Bumps [ipywidgets](https://github.com/jupyter-widgets/ipywidgets) from 8.1.1 to 8.1.2.
- [Release notes](https://github.com/jupyter-widgets/ipywidgets/releases)
- [Commits](jupyter-widgets/ipywidgets@8.1.1...8.1.2)

---
updated-dependencies:
- dependency-name: ipywidgets
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -8,7 +8,7 @@ exchange_calendars==4.5.2
 hurst==0.0.5
 ib_insync==0.9.86
 ipympl==0.9.3
-ipywidgets==8.1.1
+ipywidgets==8.1.2
 isort==5.13.2
 jedi-language-server==0.41.2
 jupyterlab==4.1.0