[images/jupyter-singleuser] Address dependabot updates (#4587)

* chore(deps): bump urllib3 in /images/jupyter-singleuser (#4569)

Bumps [urllib3](https://github.com/urllib3/urllib3) from 2.5.0 to 2.6.0.
- [Release notes](https://github.com/urllib3/urllib3/releases)
- [Changelog](https://github.com/urllib3/urllib3/blob/main/CHANGES.rst)
- [Commits](urllib3/urllib3@2.5.0...2.6.0)

---
updated-dependencies:
- dependency-name: urllib3
  dependency-version: 2.6.0
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* chore(deps): bump fonttools in /images/jupyter-singleuser (#4547)

Bumps [fonttools](https://github.com/fonttools/fonttools) from 4.59.1 to 4.61.0.
- [Release notes](https://github.com/fonttools/fonttools/releases)
- [Changelog](https://github.com/fonttools/fonttools/blob/main/NEWS.rst)
- [Commits](fonttools/fonttools@4.59.1...4.61.0)

---
updated-dependencies:
- dependency-name: fonttools
  dependency-version: 4.61.0
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* chore(deps): bump jupyterlab from 3.6.8 to 4.4.8 in /images/jupyter-singleuser (#4498)

* chore(deps): bump jupyterlab in /images/jupyter-singleuser

Bumps [jupyterlab](https://github.com/jupyterlab/jupyterlab) from 3.6.8 to 4.5.0.
 - [Release notes](https://github.com/jupyterlab/jupyterlab/releases)
 - [Changelog](https://github.com/jupyterlab/jupyterlab/blob/main/RELEASE.md)
 - [Commits](https://github.com/jupyterlab/jupyterlab/compare/@jupyterlab/[email protected]...@jupyterlab/[email protected])

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Rae Bonfanti <[email protected]>

* [images/jupyter-singleuser] Bump version for dependency updates

* Add prototype JH image for 2025.12.10

This version includes updates to urllib3, fonttools, and jupyterlab
dependencies. It should resolve corresponding dependabot alerts and
hopefully fix a notebook rendering issue identified in jupyterlab 4.4.x.

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: raebot