Fix typo (#277)

diff --git a/README.md b/README.md
index 65cde0a..e914afe 100644
--- a/README.md
+++ b/README.md
@@ -66,4 +66,4 @@
 Android libraries like UI Automator and Espresso.
 * [Mobly Bundled Snippets](https://github.com/google/mobly-bundled-snippets): a set
 of Snippets to allow Mobly tests to control Android devices by exposing a simplified
-verison of the public Android API suitable for testing.
+version of the public Android API suitable for testing.