Bump httpcore from 0.15.0 to 0.16.1

Bumps [httpcore](https://github.com/encode/httpcore) from 0.15.0 to 0.16.1.
- [Release notes](https://github.com/encode/httpcore/releases)
- [Changelog](https://github.com/encode/httpcore/blob/master/CHANGELOG.md)
- [Commits](https://github.com/encode/httpcore/compare/0.15.0...0.16.1)

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

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

requirements.txt

@@ -10,7 +10,7 @@ dnspython==2.2.1; python_version >= "3.6" and python_version < "4.0"
 google==3.0.0
 gpytranslate==1.4.0; python_version >= "3.6"
 hpack==4.0.0; python_version >= "3.6" and python_full_version >= "3.6.1"
-httpcore==0.15.0; python_version >= "3.7"
+httpcore==0.16.1; python_version >= "3.7"
 httpx[http2]==0.23.0; python_version >= "3.7"
 hyperframe==6.0.1; python_version >= "3.7" and python_full_version >= "3.6.1"
 idna==3.3; python_version >= "3.6" and (python_version >= "3.5" and python_full_version < "3.0.0" or python_full_version >= "3.6.0" and python_version >= "3.5") and python_full_version >= "3.6.2"