chore(deps): bump h11

Bumps the pip group with 1 update in the /extensions/slack-bot directory: [h11](https://github.com/python-hyper/h11).


Updates `h11` from 0.14.0 to 0.16.0
- [Commits](https://github.com/python-hyper/h11/compare/v0.14.0...v0.16.0)

---
updated-dependencies:
- dependency-name: h11
  dependency-version: 0.16.0
  dependency-type: direct:production
  dependency-group: pip
...

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

extensions/slack-bot/requirements.txt

@@ -1,6 +1,6 @@
 aiohttp>=3,<4
 certifi==2024.7.4
-h11==0.14.0
+h11==0.16.0
 httpcore==1.0.5
 httpx==0.27.0
 idna==3.7