Fix RELATED_IMAGE name for must gather

Author: dprince

config/default/manager_default_images.yaml

@@ -175,5 +175,5 @@ spec:
           value: quay.io/podified-antelope-centos9/openstack-ansible-tests:current-podified
         - name: RELATED_IMAGE_TEST_HORIZONTEST_IMAGE_URL_DEFAULT
           value: quay.io/podified-antelope-centos9/openstack-horizontest:current-podified
-        - name: RELEATED_IMAGE_OPENSTACK_MUST_GATHER_DEFAULT
+        - name: RELATED_IMAGE_OPENSTACK_MUST_GATHER_DEFAULT
           value: quay.io/openstack-k8s-operators/openstack-must-gather:latest