chore(deps): Bump zipp from 3.20.0 to 3.21.0 in /experimenter/tests

Bumps [zipp](https://github.com/jaraco/zipp) from 3.20.0 to 3.21.0.
- [Release notes](https://github.com/jaraco/zipp/releases)
- [Changelog](https://github.com/jaraco/zipp/blob/main/NEWS.rst)
- [Commits](jaraco/zipp@v3.20.0...v3.21.0)

---
updated-dependencies:
- dependency-name: zipp
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

experimenter/tests/poetry.lock

@@ -36,7 +36,7 @@ packaging = "^24.1"
 attrs = "^23.2.0"
 py = "^1.11.0"
 idna = "^3.10"
-zipp = "^3.20.0"
+zipp = "^3.21.0"
 pyparsing = "^3.2.0"
 six = "^1.16.0"
 pytest-xdist = "^3.6.1"