Bump httpx from 0.23.3 to 0.27.2

Bumps [httpx](https://github.com/encode/httpx) from 0.23.3 to 0.27.2.
- [Release notes](https://github.com/encode/httpx/releases)
- [Changelog](https://github.com/encode/httpx/blob/master/CHANGELOG.md)
- [Commits](encode/httpx@0.23.3...0.27.2)

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

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

requirements.txt

@@ -3,6 +3,6 @@ fastapi==0.90.0
 uvicorn==0.20.0
 starlette-prometheus==0.9.0
 Authlib==1.2.0
-httpx==0.23.3
+httpx==0.27.2
 itsdangerous==2.1.2
 python-jose[cryptography]==3.3.0