Misc doc changes

[ronanstokes-db]

Proposed changes

Miscellaneous doc changes for the coming release

Types of changes

What types of changes does your code introduce to dbldatagen?
Put an x in the boxes that apply

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Change to tutorials, tests or examples
• Non code change (readme, images or other non-code assets)
• Documentation Update (if none of the other choices apply)

Checklist

Put an x in the boxes that apply. You can also fill these out after creating the PR.
If you're unsure about any of them, don't hesitate to ask. We're here to help!
This is simply a reminder of what we are going to look for before merging your code.

• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream modules
• Submission does not reduce code coverage numbers
• Submission does not increase alerts or messages from prospector / lint

Further comments

If this is a relatively large or complex change, kick off the discussion by explaining why you chose the solution you
did and what alternatives you considered, etc...

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.14%. Comparing base (02d529e) to head (e8922c7).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #268   +/-   ##
=======================================
  Coverage   92.14%   92.14%           
=======================================
  Files          23       23           
  Lines        2788     2788           
  Branches      477      477           
=======================================
  Hits         2569     2569           
  Misses        130      130           
  Partials       89       89           

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