README: fix link to docs

Author: ken-matsui

README.md

@@ -13,11 +13,11 @@
 
 Poac (pronounced as `/pəʊək/`) is a package manager and build system for C++ users, inspired by Cargo for Rust.  Poac is designed as a structure-oriented build system, which means that as long as you follow Poac's designated project structure, you almost do not need configurations, much less a language to build, unlike CMake.  If you do not like writing a bunch of configurations to build your project, Poac might be best suited.  Currently, the supported project structure can be known by looking at this repository since Poac can build itself.
 
-Visit [poac.dev](https://poac.dev) and [Poac Docs](https://poac.dev/docs) for more details.
+Visit [poac.dev](https://poac.dev) and [Poac Docs](https://docs.poac.dev) for more details.
 
 ## Installation
 
-Read ["Installation"](https://poac.dev/docs/installation) from [Poac Docs](https://poac.dev/docs).
+Read ["Installation"](https://docs.poac.dev/installation) from [Poac Docs](https://docs.poac.dev).
 
 ## Installing from Source