ci: skip uv-lock on pre-commit.ci (no network access there)

[priya-sundaram-dev]

Describe your change:

The uv-lock hook added in #15111 is failing on pre-commit.ci for every PR:

uv-lock..................................................................Failed
- hook id: uv-lock
error: Request failed after 3 retries in 3.4s
  Caused by: Failed to fetch: `https://pypi.org/simple/matplotlib/`
  Caused by: dns error: failed to lookup address information: Temporary failure in name resolution

pre-commit.ci runs hooks in a sandbox without network access, but uv-lock resolves dependencies against PyPI, so it can never succeed there. This adds skip: [uv-lock] under the ci key so pre-commit.ci stops reporting a red check on unrelated PRs. The hook still runs locally and the uv.lock file is still kept in sync by the dedicated uv-lock GitHub Actions job / local runs.

This is a follow-up fixing a regression from my own #15111 — sorry for the noise.

• Add an algorithm?
• Fix a bug or typo in an existing algorithm?
• Add or change doctests? — Note: Please avoid changing both code and tests in a single pull request.
• Documentation change?

Checklist:

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized.
• I know that pull requests will not be merged if they fail the automated tests.
• This PR only changes one algorithm file. — CI/config change only.
• All new Python files are placed inside an existing directory.
• All filenames are in all lowercase characters with no spaces or dashes.
• All functions and variable names follow Python naming conventions.
• All function parameters and return values are annotated with Python type hints.
• All functions have doctests that pass the automated testing.
• All new algorithms include at least one URL that points to Wikipedia or another similar explanation.
• If this pull request resolves one or more open issues then the description above includes the issue number(s).