Merge pull request #4 from jensenbox/patch-1

Mispelling correction

index.md

@@ -68,7 +68,7 @@ Ludigraphix is currently available on the [Mac App Store](https://itunes.apple.c
 
 ## [Release notes](release-notes)
 
-# Improvments
+# Improvements
 This documentation is a work in progress.
   - You can request some documention improvments on [issues page](https://github.com/Ludigraphix/ludigraphix.github.io/issues)
   - You can propose changes on [ludigraphix.github.io project](https://github.com/Ludigraphix/ludigraphix.github.io)