Fix Step Numbering for Clarity and Consistency

[savvar9991]

In some places, "Step 2" is used, which can be confusing as it repeats twice with different subsections ("Step 2. Start the Besu node" and "Step 2. Start the Besu client").

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[savvar9991]

Hi @fab-10
I noticed "Step 2" is repeated, which could be confusing. Could we please address this and proceed?