update Making Releases in dev guide (hotfixes too) #8795

[pdurbin]

What this PR does / why we need it:

We've never made a hotfix before. Let's document the plan and revise as needed. I also addressed #8795 and did some general cleanup including moving the part about release notes to the top since we always write release notes first.

Which issue(s) this PR closes:

• Closes #8795

Special notes for your reviewer:

You can preview the HTML at https://dataverse-guide--8877.org.readthedocs.build/en/8877/developers/making-releases.html

Suggestions on how to test this:

Just docs.

Does this PR introduce a user interface change? If mockups are available, please link/include them here:

No.

Is there a release notes update needed for this change?:

No.

Additional documentation:

None.