Bump the workflows-dependencies group across 1 directory with 3 updates (#266)

Bumps the workflows-dependencies group with 3 updates in the /.github/workflows directory: [pip](https://github.com/pypa/pip), [poetry](https://github.com/python-poetry/poetry) and [virtualenv](https://github.com/pypa/virtualenv).


Updates `pip` from 25.1.1 to 25.2
- [Changelog](https://github.com/pypa/pip/blob/main/NEWS.rst)
- [Commits](pypa/pip@25.1.1...25.2)

Updates `poetry` from 2.1.3 to 2.1.4
- [Release notes](https://github.com/python-poetry/poetry/releases)
- [Changelog](https://github.com/python-poetry/poetry/blob/main/CHANGELOG.md)
- [Commits](python-poetry/poetry@2.1.3...2.1.4)

Updates `virtualenv` from 20.31.2 to 20.34.0
- [Release notes](https://github.com/pypa/virtualenv/releases)
- [Changelog](https://github.com/pypa/virtualenv/blob/main/docs/changelog.rst)
- [Commits](pypa/virtualenv@20.31.2...20.34.0)

---
updated-dependencies:
- dependency-name: pip
  dependency-version: '25.2'
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: workflows-dependencies
- dependency-name: poetry
  dependency-version: 2.1.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: workflows-dependencies
- dependency-name: virtualenv
  dependency-version: 20.34.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: workflows-dependencies
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/constraints.txt

@@ -1,5 +1,5 @@
-pip==25.1.1
+pip==25.2
 nox==2025.5.1
 nox-poetry==1.2.0
-poetry==2.1.3
-virtualenv==20.31.2
+poetry==2.1.4
+virtualenv==20.34.0