Add pspdev.github.io links to README

We want pspdev.github.io to be at the top of Google search results or at the very least for people to have access to it when they find the pspsdk api documentation first. This will help with that.

README.md

@@ -2,8 +2,7 @@
 
 [![CI](https://img.shields.io/github/actions/workflow/status/pspdev/pspsdk/.github/workflows/compilation.yml?branch=master&style=for-the-badge&logo=github&label=CI)](https://github.com/pspdev/pspsdk/actions?query=workflow:CI) [![CI-Docker](https://img.shields.io/github/actions/workflow/status/pspdev/pspsdk/.github/workflows/docker.yml?branch=master&style=for-the-badge&logo=github&label=CI-Docker)](https://github.com/pspdev/pspsdk/actions?query=workflow:CI-Docker)
 
-https://github.com/pspdev/pspsdk
-
+[https://pspdev.github.io/](https://pspdev.github.io/)
 
 ## Introduction
 
@@ -51,6 +50,10 @@ simple programs and libraries. See any PSPSDK sample program for details on how
 
 ## Installation
 
+See [https://pspdev.github.io/](https://pspdev.github.io/installation.html) for instructions on how to easily install the pspsdk.
+
+## Installation from source
+
 ### Requirements
 
 To use PSPSDK you must have the following software installed:
@@ -67,7 +70,7 @@ documentation:
 * [Doxygen](http://doxygen.nl/)
 * [Graphviz](http://www.graphviz.org/)
 
-### Installation from source
+### Building
 
 PSPSDK can be found in the Git repository located at
 https://github.com/pspdev/pspsdk. You can do the following command to download PSPSDK: