Merge pull request #9300 from upodroid/gateway-api-conformance-images

promote gateway api conformance images

Author: k8s-ci-robot

registry.k8s.io/images/k8s-staging-gateway-api/images.yaml

@@ -18,4 +18,9 @@
 - name: echo-basic
   dmap:
     "sha256:79fa51c368ac16ef6bad70bd2e0176c306a4f6e5f6f5ffe54a869ba5590ee642": ["v20251204-v1.4.1"]
+    "sha256:7e7558cf4eec0934dc1dc034e9a4be9a944720a3bc9b3991b109bc5923743e93": ["v1.4.0"]
     "sha256:fcbdfab85b3c4441e2fe8fdedd382904332ccb8253a5d51f6006c16903e7ae40": ["v1.5.0"]
+    "sha256:1930f87f9a037f8acadc37e79185bb217614d9674304e3c1f6074aec8ff6b8dc": ["v1.5.1"]
+- name: echo-advanced
+  dmap:
+    "sha256:96c3b75534386ca36c0c76ac8fdbe695f63f35bb3e0632537ffba9732c1f58c9": ["v1.4.0", "v1.5.0", "v1.5.1"]