boot/edk2/edk2.mk: fix 'release' typo

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit a52fd38060f092edbb7f558217770e136899d19f)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

boot/edk2/edk2.mk

@@ -24,7 +24,7 @@ endif
 else
 EDK2_BUILD_TYPE = RELEASE
 # DEBUG_ON_SERIAL_PORT is only valid in debug builds, so useless to set
-# it (enabled or disabled) on a relase build.
+# it (enabled or disabled) on a release build.
 endif
 
 # Build system notes.