Bump multidict from 6.1.0 to 6.6.3 (#2034)

Bumps [multidict](https://github.com/aio-libs/multidict) from 6.1.0 to 6.6.3.
- [Release notes](https://github.com/aio-libs/multidict/releases)
- [Changelog](https://github.com/aio-libs/multidict/blob/master/CHANGES.rst)
- [Commits](https://github.com/aio-libs/multidict/compare/v6.1.0...v6.6.3)

---
updated-dependencies:
- dependency-name: multidict
  dependency-version: 6.6.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pyproject.toml

@@ -48,7 +48,7 @@ Jinja2 = "^3.1.6"
 lxml = "^5.3.0"
 MarkupSafe = "^3.0.2"
 mock = "^5.1.0"
-multidict = "^6.0.4"
+multidict = "^6.6.3"
 pycountry = "^24.6.1"
 PyPDF2 = "^3.0.1"
 PySocks = "^1.7.1"