build(deps): bump jupyter-server-proxy from 3.2.2 to 4.0.0 in /docker/py

[dependabot[bot]]

Bumps jupyter-server-proxy from 3.2.2 to 4.0.0.

Changelog

Sourced from jupyter-server-proxy's changelog.

How to make a release

jupyter-server-proxy is a package available on [PyPI][] and [conda-forge][]. These are instructions on how to make a release.

Pre-requisites

• Push rights to [github.com/jupyterhub/jupyter-server-proxy][]
• Push rights to [conda-forge/jupyter-server-proxy-feedstock][]

Steps to make a release

1. Create a PR updating labextension/yarn.lock and continue only when its merged.

   This helps us avoid leaving known vulnerabilities are unfixed. To do this, delete the file and manually perform the the build dist step in the .github/workflows/publish.yaml workflow's build job as summarized below.

   rm labextension/yarn.lock
   pip install --upgrade pip build
   pyproject-build
   

2. Create a PR updating docs/source/changelog.md with [github-activity][] and continue only when its merged.

3. Checkout main and make sure it is up to date.

   git checkout main
   git fetch origin main
   git reset --hard origin/main
   

4. Update the version, make commits, and push a git tag with tbump.

   pip install tbump
   tbump --dry-run ${VERSION}
   run
   tbump ${VERSION}
   

   Following this, the [CI system][] will build and publish a release.

5. Reset the version back to dev, e.g. 4.0.1.dev0 after releasing 4.0.0.

... (truncated)

Commits

• 230188c Merge pull request #400 from consideRatio/pr/refreeze-yarn-lock
• 829e850 labextension: refreeze yarn.lock
• 8b72874 Bump to 4.0.0
• b85df45 Use semver2 version format
• 9cfb5b9 Merge pull request #399 from consideRatio/pr/add-changelog-for-4.0.0-and-3.2.2
• 448ed4c Update date
• 53b35f1 Merge pull request #398 from consideRatio/pr/docs-windows-support
• c5c4f5c Add PR to changelog
• 9b1386a Fix English grammar
• 4e278d8 Add changelog for 4.0.0, and 3.2.2 retroactively
• Additional commits viewable in compare view

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