Bump zipp from 3.4.0 to 3.19.1 in /docs (#113)

Bumps [zipp](https://github.com/jaraco/zipp) from 3.4.0 to 3.19.1.
- [Release notes](https://github.com/jaraco/zipp/releases)
- [Changelog](https://github.com/jaraco/zipp/blob/main/NEWS.rst)
- [Commits](jaraco/zipp@v3.4.0...v3.19.1)

---
updated-dependencies:
- dependency-name: zipp
  dependency-type: direct:production
...

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

docs/requirements.txt

@@ -55,5 +55,5 @@ tornado==6.4.1
 traitlets==4.3.3
 urllib3==1.26.19
 webencodings==0.5.1
-zipp==3.4.0
+zipp==3.19.1
 exhale==0.2.3