Update to Label Extension v1.0.1

[duckontheweb]

Related Issue(s):

• Closes Update label extension to 1.0.1 #611

Description:

Updates the Label Extension implementation to use v1.0.1.

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.

[duckontheweb]

cc: @cuttlefish

[codecov-commenter]

Codecov Report

Merging #726 (a1ee479) into main (3c5176f) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #726   +/-   ##
=======================================
  Coverage   94.31%   94.31%           
=======================================
  Files          77       77           
  Lines       11269    11273    +4     
  Branches     1344     1345    +1     
=======================================
+ Hits        10628    10632    +4     
  Misses        461      461           
  Partials      180      180           

Impacted Files	Coverage Δ
pystac/extensions/label.py	93.75% <100.00%> (ø)
tests/extensions/test_label.py	97.21% <100.00%> (+0.03%)	⬆️

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