arm correct sha

fixes arm sha digest, uses docker manifest inspect docker.io/istio/proxyv2:1.22.4-distroless

{
   "schemaVersion": 2,
   "mediaType": "application/vnd.docker.distribution.manifest.list.v2+json",
   "manifests": [
      {
         "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
         "size": 3988,
         "digest": "sha256:9e4b5dfbbe19af0b4e587884329ebf6cbfd04769c90f839153ba7f38814fdc4e",
         "platform": {
            "architecture": "arm64",
            "os": "linux"
         }
      },
      {
         "mediaType": "application/vnd.docker.distribution.manifest.v2+json",
         "size": 3988,
         "digest": "sha256:72afe4ceec0044c4ee533719082473b20e25fea0378922c29251e71c52caaa78",
         "platform": {
            "architecture": "amd64",
            "os": "linux"
         }
      }
   ]
}