Pin microshift build for openshift-4.17 4.17.6 (#5721)

Created by job run https://art-jenkins.apps.prod-stable-spoke1-dc-iad2.itup.redhat.com/job/aos-cd-builds/job/build%252Fbuild-microshift/1404

Co-authored-by: AOS Automation Release Team <noreply@redhat.com>

releases.yml

@@ -19,7 +19,12 @@ releases:
         upgrades: 4.16.8,4.16.9,4.16.10,4.16.11,4.16.12,4.16.13,4.16.14,4.16.15,4.16.16,4.16.17,4.16.18,4.16.19,4.16.20,4.16.21,4.16.23,4.16.24,4.17.0,4.17.1,4.17.2,4.17.3,4.17.4,4.17.5
       members:
         images: []
-        rpms: []
+        rpms:
+        - distgit_key: microshift
+          why: Pin microshift to assembly
+          metadata:
+            is:
+              el9: microshift-4.17.6-202411220621.p0.gb88f40d.assembly.4.17.6.el9
       rhcos:
         rhel-coreos:
           images: