Fix readme typo (#89)

Add space to readme between includes and client in the first paragraph.

Author: technetos

README.md

@@ -4,7 +4,7 @@
 [![CI](https://github.com/hyperium/h3/workflows/CI/badge.svg)](https://github.com/hyperium/h3/actions?query=workflow%3ACI)
 [![Discord chat](https://img.shields.io/discord/500028886025895936.svg?logo=discord)](https://discord.gg/q5mVhMD)
 
-This crate provides an [HTTP/3][spec] implementation that is generic over a provided QUIC transport. This allows the project to focus on just HTTP/3, while letting users pick their QUIC implementation based on their specific needs. It includesclient and server APIs. Check the original [design][] for more details.
+This crate provides an [HTTP/3][spec] implementation that is generic over a provided QUIC transport. This allows the project to focus on just HTTP/3, while letting users pick their QUIC implementation based on their specific needs. It includes client and server APIs. Check the original [design][] for more details.
 
 [spec]: https://quicwg.org/base-drafts/draft-ietf-quic-http.html
 [design]: design/PROPOSAL.md