Bump typing-extensions from 4.5.0 to 4.9.0

Bumps [typing-extensions](https://github.com/python/typing_extensions) from 4.5.0 to 4.9.0.
- [Release notes](https://github.com/python/typing_extensions/releases)
- [Changelog](https://github.com/python/typing_extensions/blob/main/CHANGELOG.md)
- [Commits](python/typing_extensions@4.5.0...4.9.0)

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

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

Author: dependabot[bot]

docs/requirements.txt

@@ -2,4 +2,4 @@ sphinx~=5.3
 sphinx-rtd-theme>=1.0.0
 # v4.6.0 breaks bases (which multiformats etc use)
 # https://github.com/hashberg-io/bases/issues/3
-typing_extensions==4.5.0
+typing_extensions==4.9.0