Bump multidict from 6.3.2 to 6.4.2 (#1432)

Bumps [multidict](https://github.com/aio-libs/multidict) from 6.3.2 to 6.4.2.
- [Release notes](https://github.com/aio-libs/multidict/releases)
- [Changelog](https://github.com/aio-libs/multidict/blob/master/CHANGES.rst)
- [Commits](aio-libs/multidict@v6.3.2...v6.4.2)

---
updated-dependencies:
- dependency-name: multidict
  dependency-version: 6.4.2
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

demos/moderator_bot/requirements-dev.txt

@@ -9,7 +9,7 @@ idna==3.10
 importlib-metadata==0.23 ; python_version < '3.8'
 joblib==1.4.2
 more-itertools==10.6.0
-multidict==6.3.2
+multidict==6.4.2
 numpy==1.26.4
 pluggy==1.5.0
 pytest==8.3.5