Fix typos

README.md

@@ -6,11 +6,11 @@
 [![codecov.io](https://codecov.io/github/JuliaGraphics/Gtk.jl/coverage.svg?branch=master)](https://codecov.io/github/JuliaGraphics/Gtk.jl?branch=master)
 [![](https://img.shields.io/badge/docs-latest-blue.svg)](https://juliagraphics.github.io/Gtk.jl/latest)
 
-This libraray is NO LONGER SUPPORTED.
-Users should migrate to the package
+This package is NO LONGER SUPPORTED.
+Users should migrate to
 [Gtk4.jl](https://github.com/JuliaGtk/Gtk4.jl),
 following the
-[tipcs on the differences betwen Gtk3 and Gtk4](https://juliagtk.github.io/Gtk4.jl/dev/diff3to4).
+[tips on the differences betwen Gtk3 and Gtk4](https://juliagtk.github.io/Gtk4.jl/dev/diff3to4).
 
 GUI building, using the Gtk library: [https://www.gtk.org/](https://www.gtk.org/)