📖 getting-started: clean up ironic bits

[dtantsur]

Explain the deploy ramdisk in a cleaner way.
Use consistent spelling for Ironic (upper case).

[furkatgofurov7]

Thanks for the patch @dtantsur. Regarding the consistency, we could fix also all other occurrences of 'Ironic' in other documents in the same patch, maybe? Here is the list of docs I found mentioning it (might not be full list though):

• https://github.com/metal3-io/cluster-api-provider-metal3/blob/master/docs/architecture.md
• https://github.com/metal3-io/cluster-api-provider-metal3/blob/master/docs/deployment_workflow.md
• https://github.com/metal3-io/cluster-api-provider-metal3/blob/master/docs/dev-setup.md

[dtantsur]

I don't disagree with that, but I don't have time to go through other documents, unfortunately.

[furkatgofurov7]

@dtantsur can you please fix the markdown issue? Then, this can go as it is, and making consistent all other occurrences of 'Ironic' in other documents will be tackled in #202.

[fmuyassarov]

/retest

[fmuyassarov]

/lgtm

[fmuyassarov]

/test golint

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[kashifest]

@dtantsur you need to take care of the markdownlint error. Thanks for explaining ramdisk.

[fmuyassarov]

/test-integration

[furkatgofurov7]

/lgtm