Fix the "how to create STAC catalogs" tutorial

[gadomski]

Related Issue(s):

• Closes Error in pystac/docs/tutorials/how-to-create-stac-catalogs.ipynb #771

Description: Fixes the how-to-create-stac-catalogs tutorial to use the new extension syntax. Also includes:

• Some AWS config fixups
• Minor typing fixups (not perfect)
• Sidecar change to the concepts documentation file to add self parameters to the IO class example
• Pins black's click dependency to work around Incompatible with click 8.1.0 (ImportError: cannot import name '_unicodefun' from 'click') psf/black#2964

PR Checklist:

• Code is formatted (run pre-commit run --all-files)
• Tests pass (run scripts/test)
• Documentation has been updated to reflect changes, if applicable
• This PR maintains or improves overall codebase code coverage.
• Changes are added to the CHANGELOG. See the docs for information about adding to the changelog.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.55%. Comparing base (3209bf8) to head (3f88cde).
⚠️ Report is 693 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #775   +/-   ##
=======================================
  Coverage   94.55%   94.55%           
=======================================
  Files          79       79           
  Lines       11647    11647           
  Branches     1372     1372           
=======================================
  Hits        11013    11013           
  Misses        455      455           
  Partials      179      179           

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[duckontheweb]

Looks good to me, thanks @gadomski !