Mark puppet-congress retired

This change adds missing retired flags to puppet-congress which was
already retied[1].

[1] 9e9383488f5188aae8f0ef18c3344305ce04c294

Change-Id: Ica27a7361463e07a3459d29fe70d8535cb511979

deliverables/queens/puppet-congress.yaml

@@ -29,7 +29,9 @@ releases:
       - repo: openstack/puppet-congress
         hash: 31b00f3a1bd2badd18ef3c9e7f54d41e0f56445f
 repository-settings:
-  openstack/puppet-congress: {}
+  openstack/puppet-congress:
+    flags:
+      - retired
 branches:
   - location: 12.3.0
     name: stable/queens

deliverables/rocky/puppet-congress.yaml

@@ -4,7 +4,9 @@ release-model: cycle-trailing
 team: Puppet OpenStack
 type: other
 repository-settings:
-  openstack/puppet-congress: {}
+  openstack/puppet-congress:
+    flags:
+      - retired
 releases:
   - projects:
       - hash: 06abca1acb76b9b44fa21a672c3f7e93855bb30e

deliverables/stein/puppet-congress.yaml

@@ -4,7 +4,9 @@ release-model: cycle-trailing
 team: Puppet OpenStack
 type: other
 repository-settings:
-  openstack/puppet-congress: {}
+  openstack/puppet-congress:
+    flags:
+      - retired
 releases:
   - projects:
       - hash: 5a3675e92cccbbf4a164b27015df23f13b70cc4b

deliverables/train/puppet-congress.yaml

@@ -4,7 +4,9 @@ release-model: cycle-trailing
 team: Puppet OpenStack
 type: other
 repository-settings:
-  openstack/puppet-congress: {}
+  openstack/puppet-congress:
+    flags:
+      - retired
 releases:
   - projects:
       - hash: 49d89d34cd4439fec07456d25aca13f0787b16cd

deliverables/ussuri/puppet-congress.yaml

@@ -4,7 +4,9 @@ release-model: cycle-with-intermediary
 team: Puppet OpenStack
 type: trailing
 repository-settings:
-  openstack/puppet-congress: {}
+  openstack/puppet-congress:
+    flags:
+      - retired
 releases:
   - projects:
       - hash: 275362243cd958b0ba29fe9a212075cd3eb410d9