Generate YAML doc

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

docs/reference/docker_buildx_ls.yaml

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+command: docker buildx ls
+short: List builder instances
+long: |-
+  Lists all builder instances and the nodes for each instance
+
+  **Example**
+
+  ```console
+  $ docker buildx ls
+
+  NAME/NODE       DRIVER/ENDPOINT             STATUS  PLATFORMS
+  elated_tesla *  docker-container
+    elated_tesla0 unix:///var/run/docker.sock running linux/amd64
+    elated_tesla1 ssh://ubuntu@1.2.3.4        running linux/arm64, linux/arm/v7, linux/arm/v6
+  default         docker
+    default       default                     running linux/amd64
+  ```
+
+  Each builder has one or more nodes associated with it. The current builder's
+  name is marked with a `*`.
+usage: docker buildx ls
+pname: docker buildx
+plink: docker_buildx.yaml
+inherited_options:
+- option: builder
+  value_type: string
+  description: Override the configured builder instance
+  deprecated: false
+  experimental: false
+  experimentalcli: false
+  kubernetes: false
+  swarm: false
+deprecated: false
+experimental: false
+experimentalcli: false
+kubernetes: false
+swarm: false
+