release: Zephyr 4.1.0

Set version to v4.1.0.

Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>

Author: kartben

VERSION

@@ -2,4 +2,4 @@ VERSION_MAJOR = 4
 VERSION_MINOR = 1
 PATCHLEVEL = 0
 VERSION_TWEAK = 0
-EXTRAVERSION = rc3
+EXTRAVERSION =