Update the uv.lock file on a schedule

[smithara]

Create an automation to update the lock file, weekly/(monthly?)

References:

• https://github.com/PlasmaPy/PlasmaPy/blob/252d67753b0987840dc0ea52f1e8450d2e0298e5/noxfile.py#L141
• https://github.com/PlasmaPy/PlasmaPy/blob/main/.github/workflows/upgrade-uv-lock.yml

Consider also testing against pre-release versions of dependencies