Bump multidict from 5.2.0 to 6.0.2

Bumps [multidict](https://github.com/aio-libs/multidict) from 5.2.0 to 6.0.2.
- [Release notes](https://github.com/aio-libs/multidict/releases)
- [Changelog](https://github.com/aio-libs/multidict/blob/master/CHANGES.rst)
- [Commits](aio-libs/multidict@v5.2.0...v6.0.2)

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

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

requirements.txt

@@ -32,7 +32,7 @@ import-expression==1.1.4
 importlib-metadata==4.10.1
 jishaku @ git+https://github.com/Gorialis/jishaku.git@d8e676f55a48e1ffad14e13e733debd4ab93eccb
 mal-api==0.5.2
-multidict==5.2.0
+multidict==6.0.2
 mystbin.py==2.2.0
 orjson==3.6.6
 parsedatetime==2.6