Bump httpcore from 1.0.2 to 1.0.3

Bumps [httpcore](https://github.com/encode/httpcore) from 1.0.2 to 1.0.3.
- [Release notes](https://github.com/encode/httpcore/releases)
- [Changelog](https://github.com/encode/httpcore/blob/master/CHANGELOG.md)
- [Commits](encode/httpcore@1.0.2...1.0.3)

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

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

requirements.txt

@@ -1,7 +1,7 @@
 anyio==4.2.0
 certifi==2023.11.17
 h11==0.14.0
-httpcore==1.0.2
+httpcore==1.0.3
 httpx==0.25.2
 idna==3.6
 rfc3986==1.5.0