Update MCUboot to TF-Mv1.4-integ

Signed-off-by: Sherry Zhang <sherry.zhang2@arm.com>
Change-Id: Iee6d248b6a96c8a7c24ce827a8163186f43d42a2
diff --git a/tf-m-cppcheck.yaml b/tf-m-cppcheck.yaml
index 1ca08f4..4426be3 100644
--- a/tf-m-cppcheck.yaml
+++ b/tf-m-cppcheck.yaml
@@ -60,7 +60,7 @@
           default: 'https://git.trustedfirmware.org/mirror/mbed-tls.git'
       - string:
           name: 'MCUBOOT_REFSPEC'
-          default: 'TF-Mv1.4-integ-rc2'
+          default: 'TF-Mv1.4-integ'
           description: |
             Specify which MCUboot version to use
             refs/heads/master    : Pick up latest master