release: bump kernel kit version to v7.4.0

Signed-off-by: Shikha Vyaghra <vyaghras@amazon.com>

Author: vyaghras

Twoliter.toml

@@ -1,5 +1,5 @@
 schema-version = 2
-release-version = "7.3.0"
+release-version = "7.4.0"
 project-vendor = "Bottlerocket"
 
 [vendor.bottlerocket]