Adding thoughts on technical posts to the blog handbook "how to write" section

Why is this change being made?

Adding expert advice to the "how to write" section in the handbook.

Describe in detail answer to question on why this change is being proposed, in accordance with our value of Transparency

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Does this MR meet the acceptance criteria?

Assign to DRI

• Did you assign this change to the correct DRI of the page or information you are changing?

Conformity

• Added description to this MR explaining the reasons for the proposed change, per say-why-not-just-what