build(deps): bump the pip group across 1 directory with 7 updates

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Summary by cubic

Update Python dependencies in packages/python to latest patch/minor versions for security and stability. Notable: jupyter-server and urllib3 now require Python 3.10+.

• Dependencies

  • bleach → 6.4.0
  • idna → 3.15
  • jupyter-server → 2.20.0
  • jupyterlab → 4.5.9
  • pymdown-extensions → 10.21.3
  • tornado → 6.5.7
  • urllib3 → 2.7.0

• Migration

  • Ensure runtime and CI use Python 3.10 or newer.

^{Written for commit 404b599. Summary will update on new commits.}