Bump jupyterlab-git from 0.51.4 to 0.54.0a1

Bumps [jupyterlab-git](https://github.com/jupyterlab/jupyterlab-git) from 0.51.4 to 0.54.0a1.
- [Release notes](https://github.com/jupyterlab/jupyterlab-git/releases)
- [Changelog](https://github.com/jupyterlab/jupyterlab-git/blob/main/CHANGELOG.md)
- [Commits](jupyterlab/jupyterlab-git@v0.51.4...v0.54.0a1)

---
updated-dependencies:
- dependency-name: jupyterlab-git
  dependency-version: 0.54.0a1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,7 +1,7 @@
 click==8.3.1
 ipywidgets==8.1.8
 jupyterlab==4.5.3
-jupyterlab-git==0.51.4
+jupyterlab-git==0.54.0a1
 matplotlib==3.10.8
 myst-parser==5.0.0
 myst-nb==1.4.0