README.md: fix typo in the project name

Change-Id: I1d0a7488a55d7866446797e99f585885cd446ebe
diff --git a/README.md b/README.md
index b33e52a..5cf880e 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 gapk - GSM Audio Pocket Knife
 =============================
 
-The GSM Audio Picket Knife is a tool that can help you to convert
+The GSM Audio Pocket Knife is a tool that can help you to convert
 codec frames of all codecs in GSM networks between a variety of
 different formats / representations.