.sync/Version.njk: Update Mu repos to Mu DevOps v1.7.4 (#104)

Changes since last release:
v1.4.2...v1.7.4

General release Info: https://github.com/microsoft/mu_devops/releases

Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>

Author: makubacki

.sync/Version.njk

@@ -30,7 +30,7 @@
 #}
 
 {# The git ref value that files dependent on this repo will use. #}
-{% set mu_devops = "v1.4.2" %}
+{% set mu_devops = "v1.7.4" %}
 
 {# The version of the fedora-35-build container to use. #}
 {% set linux_build_container = "ghcr.io/tianocore/containers/fedora-35-build:5b8a008" %}