Fix typo (intertia_rails) in README.md

* Changes intertia_rails to inertia_rails in README.md

Author: larssg

README.md

@@ -6,7 +6,7 @@ Visit [inertiajs.com](https://inertiajs.com/) to learn more.
 
 The initial version of the gem was named `inertia`; however, that name was not available on Rubygems. 
 
-The 1.0.0 version release on Rubygems is `intertia_rails`.
+The 1.0.0 version release on Rubygems is `inertia_rails`.
 
 The changes required are: