Update mirror.txt (#5360)

* Update mirror.txt

* Fix format

---------

Co-authored-by: Shiming Zhang <wzshiming@foxmail.com>

allows.txt

@@ -28,6 +28,7 @@ docker.io/foxdalas/**
 docker.io/frrouting/**
 docker.io/goharbor/**
 docker.io/grafana/**
+docker.io/halohub/halo
 docker.io/istio/**
 docker.io/jaegertracing/**
 docker.io/jboss/**

mirror.txt

@@ -86,6 +86,7 @@ docker.io/goharbor/redis-photon
 docker.io/goharbor/registry-photon
 docker.io/goharbor/trivy-adapter-photon
 docker.io/grafana/grafana
+docker.io/halohub/halo
 docker.io/istio/examples-bookinfo-details-v1
 docker.io/istio/examples-bookinfo-productpage-v1
 docker.io/istio/examples-bookinfo-ratings-v1