Bump multidict from 6.4.3 to 6.6.4

Bumps [multidict](https://github.com/aio-libs/multidict) from 6.4.3 to 6.6.4.
- [Release notes](https://github.com/aio-libs/multidict/releases)
- [Changelog](https://github.com/aio-libs/multidict/blob/master/CHANGES.rst)
- [Commits](aio-libs/multidict@v6.4.3...v6.6.4)

---
updated-dependencies:
- dependency-name: multidict
  dependency-version: 6.6.4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

requirements.txt

@@ -24,7 +24,7 @@ jstyleson==0.0.2
 lxml==5.4.0
 lxml_html_clean==0.4.2
 mf2py==2.0.1
-multidict==6.4.3
+multidict==6.6.4
 opentelemetry-api==1.36.0
 opentelemetry-instrumentation==0.57b0
 opentelemetry-exporter-otlp-proto-grpc==1.36.0