doc: fix typo in gpmrb doc

Fix typo missed during regular review

Signed-off-by: David B. Kinder <[email protected]>

Author: dbkinder

boards/x86/gpmrb/doc/index.rst

@@ -121,12 +121,12 @@ Launch Zephyr
 =============
 
 Connect to UART 2 on the GP MRB and press the "ignition" button. After
-initialization messages, you will the Zephyr banner:
+initialization messages, you will see the Zephyr banner:
 
 .. code-block:: console
 
    ***** Booting Zephyr OS v1.14.0-rc3-1254-g2a086e4c13ef *****
    Hello World! gpmrb
 
 
-Congratulations! You are running Zephyr on your Gordon Peak MRB!
+You are running a Zephyr application on your Gordon Peak MRB.