VERSION: bump for 4.0.0-rc3

Update the VERSION file to reflect the taggingg for v4.0.0-rc3 release

(cherry picked from commit c50777a)

Original-Signed-off-by: Dan Kalowsky <dkalowsky@amperecomputing.com>
GitOrigin-RevId: c50777a
Cr-Build-Id: 8731572062094510337
Cr-Build-Url: https://cr-buildbucket.appspot.com/build/8731572062094510337
Copybot-Job-Name: zephyr-main-copybot-downstream
Change-Id: I87eee9b26508e3c85f2278a4ffb9f3804047135e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/6008708
Tested-by: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>
Tested-by: Al Semjonovs <asemjonovs@google.com>
Commit-Queue: Al Semjonovs <asemjonovs@google.com>
Reviewed-by: Al Semjonovs <asemjonovs@google.com>

VERSION

@@ -2,4 +2,4 @@ VERSION_MAJOR = 4
 VERSION_MINOR = 0
 PATCHLEVEL = 0
 VERSION_TWEAK = 0
-EXTRAVERSION = rc2
+EXTRAVERSION = rc3