engine: 28.0.0 (#22007)

- follow up to: https://github.com/docker/docs/pull/21932
## Description

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## Related issues or tickets

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## Reviews

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- [ ] Technical review
- [ ] Editorial review
- [ ] Product review

---------

Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>

data/engine-cli/docker_save.yaml

@@ -16,6 +16,17 @@ options:
       experimentalcli: false
       kubernetes: false
       swarm: false
+    - option: platform
+      value_type: string
+      description: |
+        Save only the given platform variant. Formatted as `os[/arch[/variant]]` (e.g., `linux/amd64`)
+      deprecated: false
+      hidden: false
+      min_api_version: "1.48"
+      experimental: false
+      experimentalcli: false
+      kubernetes: false
+      swarm: false
 inherited_options:
     - option: help
       value_type: bool