doc/relnotes/4.13: Remove duplicated `CPU`

Change-Id: Ib423a0d4341560301138e06b00a704c2baae4867
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/47767
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Christian Walter <christian.walter@9elements.com>
Reviewed-by:  Felix Singer <felixsinger@posteo.net>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Michael Niewöhner <foss@mniewoehner.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/Documentation/releases/coreboot-4.13-relnotes.md b/Documentation/releases/coreboot-4.13-relnotes.md
index 32116e6..a366d35 100644
--- a/Documentation/releases/coreboot-4.13-relnotes.md
+++ b/Documentation/releases/coreboot-4.13-relnotes.md
@@ -62,7 +62,7 @@
 
 ### New version of SMM loader
 
-A new version of the SMM loader which accommodates platforms with over 32 CPU
+A new version of the SMM loader which accommodates platforms with over 32
 CPU threads.  The existing version of SMM loader uses a 64K code/data
 segment and only a limited number of CPU threads can fit into one segment
 (because of save state, STM, other features, etc). This loader extends beyond