zunitc: fix spelling mistake

Signed-off-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Bryce Harrington <bryce@osg.samsung.com>
diff --git a/tools/zunitc/inc/zunitc/zunitc.h b/tools/zunitc/inc/zunitc/zunitc.h
index 0fa78e3..6ac6f39 100644
--- a/tools/zunitc/inc/zunitc/zunitc.h
+++ b/tools/zunitc/inc/zunitc/zunitc.h
@@ -189,7 +189,7 @@
  * character will match any sequence and the '?' character will match any
  * single character.
  * The '-' character at the start of a pattern marks the end of the
- * patterns required to match and the begining of patterns that names
+ * patterns required to match and the beginning of patterns that names
  * must not match.
  * Defaults to use all tests.
  *