Add release instructions

[romanlutz]

Description

Adding instructions for creating a new release.

Tests

• no new tests required
• new tests added
• existing tests adjusted

Documentation

• no documentation changes needed
• documentation added or edited
• example notebook added or updated

[nina-msft]

Peppering with questions that come to mind - take or leave whether to add more information into markdown but I tried to highlight what I'd ask about!

[rlundeen2]

Nina has valid points, still good docs even if we clarify these later

[nina-msft]

lgtm, but looks like you now have feedback from christian too :)