title: Rename `ExportGenesisStateCommand` to `ExportGenesisHeadCommand`

doc:
  - audience: Node Operator
    description: |
      The `export-genesis-state` subcommand is now called `export-gensis-head`, but
      `export-genesis-state` stays as an alias to not break any scripts.

  - audience: Node Dev
    description: |
      The struct `ExportGenesisStateCommand` is now called `ExportGenesisHeadCommand`.
      So, you only need to rename the import and usage. The `run` function is now
      taking only a `client` as argument to fetch the genesis header. This way
      the exported genesis head is respecting custom genesis block builders.

crates:
  - name: "cumulus-client-cli"