Log Message:
py-httpcore: updated to 0.13.6

0.13.6

Fixed
- Close sockets when read or write timeouts occur.

0.13.5

Fixed
- Resolved niggles with AnyIO EOF behaviours.

0.13.4

Added
- Improved error messaging when URL scheme is missing, or a non HTTP(S) scheme \ 
is used.

Fixed
- Switched to `anyio` as the default backend implementation when running with \ 
`asyncio`. Resolves some awkward [TLS timeout \ 
issues](https://github.com/encode/httpx/discussions/1511).