Improve formatting of Docker Desktop instructions

[JustinKuli]

Changes

It seems like the formatting for this section got messed up at some point, so mostly this just fixes that, and adjusts other things to be slightly more clear (in my opinion).

Submitter Checklist

These are the criteria that every PR should meet, please check them off as you
review them:

• [n/a] Includes tests (if functionality changed/added)
• Includes docs (if user facing)
• Commit messages follow commit message best practices

See the contribution guide for more details.

Double check this list of stuff that's easy to miss:

• If you are adding a new binary/image to the cmd dir, please update
  the release Task to build and release this image.

Reviewer Notes

If API changes are included, additive changes must be approved by at least two OWNERS and backwards incompatible changes must be approved by more than 50% of the OWNERS, and they must first be added in a backwards compatible way.

(Edited by sbwsg to remove Release Notes section)

[tekton-robot]

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[tekton-robot]

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kind/bug: Categorizes issue or PR as related to a bug.
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[tekton-robot]

This PR cannot be merged: expecting exactly one kind/ label

Available kind/ labels are:

kind/bug: Categorizes issue or PR as related to a bug.
kind/flake: Categorizes issue or PR as related to a flakey test
kind/cleanup: Categorizes issue or PR as related to cleaning up code, process, or technical debt.
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[JustinKuli]

/kind documentation

[ghost]

/ok-to-test

[jlpettersson]

/lgtm

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jlpettersson, sbwsg

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