Bump virtualenv from 20.29.3 to 20.36.1 in /docs (#263)

Bumps [virtualenv](https://github.com/pypa/virtualenv) from 20.29.3 to 20.36.1.
- [Release notes](https://github.com/pypa/virtualenv/releases)
- [Changelog](https://github.com/pypa/virtualenv/blob/main/docs/changelog.rst)
- [Commits](pypa/virtualenv@20.29.3...20.36.1)

---
updated-dependencies:
- dependency-name: virtualenv
  dependency-version: 20.36.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

docs/requirements.txt

@@ -1855,9 +1855,9 @@ uv==0.9.6 \
     # via
     #   -r requirements/dev-requirements.txt
     #   pyelli (pyproject.toml)
-virtualenv==20.29.3 \
-    --hash=sha256:3e3d00f5807e83b234dfb6122bf37cfadf4be216c53a49ac059d02414f819170 \
-    --hash=sha256:95e39403fcf3940ac45bc717597dba16110b74506131845d9b687d5e73d947ac
+virtualenv==20.36.1 \
+    --hash=sha256:575a8d6b124ef88f6f51d56d656132389f961062a9177016a50e4f507bbcc19f \
+    --hash=sha256:8befb5c81842c641f8ee658481e42641c68b5eab3521d8e092d18320902466ba
     # via
     #   -r requirements/dev-requirements.txt
     #   pre-commit