Bump zipp from 3.20.2 to 3.21.0

Bumps [zipp](https://github.com/jaraco/zipp) from 3.20.2 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@v3.20.2...v3.21.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,3 +1,3 @@
 importlib-metadata==8.5.0
 Markdown==3.7
-zipp==3.20.2
+zipp==3.21.0