release: Zephyr 2.7.4

Set version to 2.7.4

Signed-off-by: Chris Friedt <cfriedt@meta.com>
diff --git a/VERSION b/VERSION
index ec52e4b..853606a 100644
--- a/VERSION
+++ b/VERSION
@@ -1,5 +1,5 @@
 VERSION_MAJOR = 2
 VERSION_MINOR = 7
-PATCHLEVEL = 3
+PATCHLEVEL = 4
 VERSION_TWEAK = 0
 EXTRAVERSION =