Bump async-timeout from 4.0.2 to 4.0.3 (#578)

Bumps [async-timeout](https://github.com/aio-libs/async-timeout) from 4.0.2 to 4.0.3.
- [Release notes](https://github.com/aio-libs/async-timeout/releases)
- [Changelog](https://github.com/aio-libs/async-timeout/blob/master/CHANGES.rst)
- [Commits](aio-libs/async-timeout@v4.0.2...v4.0.3)

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

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

Author: dependabot[bot]

requirements.txt

@@ -1,6 +1,6 @@
 aiohttp==3.8.5
 appdirs==1.4.4
-async-timeout==4.0.2
+async-timeout==4.0.3
 cachetools==5.3.1
 chardet==5.1.0
 gidgethub==5.3.0