Prepare v2023.10-rc4

Signed-off-by: Tom Rini <trini@konsulko.com>

Makefile

diff --git a/Makefile b/Makefile
index 033daf1..9be24c4 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@
 VERSION = 2023
 PATCHLEVEL = 10
 SUBLEVEL =
-EXTRAVERSION = -rc3
+EXTRAVERSION = -rc4
 NAME =
 
 # *DOCUMENTATION*

doc/develop/release_cycle.rst

diff --git a/doc/develop/release_cycle.rst b/doc/develop/release_cycle.rst
index 50d33df..346cf29 100644
--- a/doc/develop/release_cycle.rst
+++ b/doc/develop/release_cycle.rst
@@ -70,7 +70,7 @@
 
 * U-Boot v2023.10-rc3 was released on Mon 21 August 2023.
 
-.. * U-Boot v2023.10-rc4 was released on Mon 04 September 2023.
+* U-Boot v2023.10-rc4 was released on Mon 04 September 2023.
 
 .. * U-Boot v2023.10-rc5 was released on Mon 18 September 2023.