Prepare v2026.04-rc4

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

Makefile

diff --git a/Makefile b/Makefile
index 5df8692..bbe0c36 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@
 VERSION = 2026
 PATCHLEVEL = 04
 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 0544929..74834f5 100644
--- a/doc/develop/release_cycle.rst
+++ b/doc/develop/release_cycle.rst
@@ -77,7 +77,7 @@
 
 * U-Boot |next_ver|-rc3 was released on Mon 23 February 2026.
 
-.. * U-Boot |next_ver|-rc4 was released on Mon 09 March 2026.
+* U-Boot |next_ver|-rc4 was released on Mon 09 March 2026.
 
 .. * U-Boot |next_ver|-rc5 was released on Mon 23 March 2026.