Fix typo in code documentation

Change-Id: Ib2f0023657ce4f9f8feddfac772c0ff53e88e50b
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/gui/lib/gui_resource.robot b/gui/lib/gui_resource.robot
index f45c19a..0331cc1 100644
--- a/gui/lib/gui_resource.robot
+++ b/gui/lib/gui_resource.robot
@@ -11,7 +11,7 @@
 *** Variables ***
 ${obmc_gui_url}              https://${OPENBMC_HOST}
 
-# Default GUI broswer and mode is set to "Firefox" and "headless"
+# Default GUI browser and mode is set to "Firefox" and "headless"
 # respectively here.
 ${GUI_BROWSER}               ff
 ${GUI_MODE}                  headless