release: Zephyr 3.5.0-rc3

Bump the version to 3.5.0-rc3.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
diff --git a/VERSION b/VERSION
index 7191790..5ed75f8 100644
--- a/VERSION
+++ b/VERSION
@@ -2,4 +2,4 @@
 VERSION_MINOR = 5
 PATCHLEVEL = 0
 VERSION_TWEAK = 0
-EXTRAVERSION = rc2
+EXTRAVERSION = rc3