Fix typo in ensure-release-projects.sh

[spiffxp]

Turns out gs://k8s-release-dev didn't have the appropriate world-readable permissions applied, so gcsweb.k8s.io couldn't display its contents

Followup to #1110 and #1195
Part of #846

[spiffxp]

FYI @kubernetes/release-engineering

[hasheddan]

/lgtm

[k8s-ci-robot]

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[spiffxp]

Ran ./infra/gcp/ensure-release-projects.sh

Confirmed permissions look better now

$ gsutil iam get gs://k8s-release-dev
{
  "bindings": [
    {
      "members": [
        "group:[email protected]",
        "projectEditor:k8s-release",
        "projectOwner:k8s-release"
      ],
      "role": "roles/storage.legacyBucketOwner"
    },
    {
      "members": [
        "projectViewer:k8s-release"
      ],
      "role": "roles/storage.legacyBucketReader"
    },
    {
      "members": [
        "group:[email protected]",
        "group:[email protected]",
        "serviceAccount:[email protected]"
      ],
      "role": "roles/storage.legacyBucketWriter"
    },
    {
      "members": [
        "group:[email protected]",
        "group:[email protected]",
        "group:[email protected]",
        "serviceAccount:[email protected]"
      ],
      "role": "roles/storage.objectAdmin"
    },
    {
      "members": [
        "allUsers"
      ],
      "role": "roles/storage.objectViewer"
    }
  ],
  "etag": "CA0="
}