Fixed Typo in README

Closes #2822

// FREEBIE

README.md

@@ -22,7 +22,7 @@ You can subscribe to TextSecure Beta releases in two steps:
 1. Join the [TextSecure Beta Google+ Community](https://plus.google.com/communities/114424213916773497091).
 1. After you've joined the community, [subscribe to the beta](https://play.google.com/apps/testing/org.thoughtcrime.securesms).
 
-If you're interesting a life of peace and tranquility, stick with the standard releases.
+If you're interested in a life of peace and tranquility, stick with the standard releases.
 
 ## Contributing Translations
 Interested in helping to translate TextSecure? Contribute here: