Bump black from 23.12.1 to 24.3.0 in /examples/gemini/python/docs-agent

Bumps [black](https://github.com/psf/black) from 23.12.1 to 24.3.0.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@23.12.1...24.3.0)

---
updated-dependencies:
- dependency-name: black
  dependency-type: direct:development
...

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

Author: dependabot[bot]

examples/gemini/python/docs-agent/poetry.lock

@@ -29,7 +29,7 @@ flask = "^2.3.2"
 [tool.poetry.group.dev.dependencies]
 ipython = "^8.13.2"
 pylint = "^2.17.4"
-black = "^23.3.0"
+black = "^24.3.0"
 deptry = "^0.13.0"
 
 [tool.deptry.per_rule_ignores]