Bump multidict from 6.0.2 to 6.0.4 (#529)

Bumps [multidict](https://github.com/aio-libs/multidict) from 6.0.2 to 6.0.4.
- [Release notes](https://github.com/aio-libs/multidict/releases)
- [Changelog](https://github.com/aio-libs/multidict/blob/master/CHANGES.rst)
- [Commits](aio-libs/multidict@v6.0.2...v6.0.4)

---
updated-dependencies:
- dependency-name: multidict
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

requirements.txt

@@ -4,7 +4,7 @@ async-timeout==4.0.2
 cachetools==5.2.0
 chardet==5.0.0
 gidgethub==5.2.1
-multidict==6.0.2
+multidict==6.0.4
 packaging==21.3
 py==1.11.0
 pyparsing==3.0.9