Bump ipywidgets from 8.1.3 to 8.1.5

Bumps [ipywidgets](https://github.com/jupyter-widgets/ipywidgets) from 8.1.3 to 8.1.5.
- [Release notes](https://github.com/jupyter-widgets/ipywidgets/releases)
- [Commits](jupyter-widgets/ipywidgets@8.1.3...8.1.5)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

poetry.lock

@@ -74,7 +74,7 @@ gpytorch = "^1.13"
 
 [tool.poetry.group.dev.dependencies]
 ipython = "^8.26.0"
-ipywidgets = "^8.1.3"
+ipywidgets = "^8.1.5"
 jupyter-core = "^5.7.2"
 black = "^24.8.0"
 pytest = "^8.3.2"