Documentation: fix typo

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
diff --git a/qemu-doc.texi b/qemu-doc.texi
index ad19b73..149e9bd 100644
--- a/qemu-doc.texi
+++ b/qemu-doc.texi
@@ -227,7 +227,7 @@
 QEMU uses GUS emulation (GUSEMU32 @url{http://www.deinmeister.de/gusemu/})
 by Tibor "TS" Schütz.
 
-Not that, by default, GUS shares IRQ(7) with parallel ports and so
+Note that, by default, GUS shares IRQ(7) with parallel ports and so
 qemu must be told to not have parallel ports to have working GUS
 
 @example