Update temporal-polyfill status to stable

[arshaw]

temporal-polyfill has reached 1.0 and is no longer in beta. Thank you!

[ptomato]

🎉

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.39%. Comparing base (2c71cc9) to head (64bc5cc).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3326   +/-   ##
=======================================
  Coverage   98.39%   98.39%           
=======================================
  Files          22       22           
  Lines       10796    10796           
  Branches     1875     1875           
=======================================
  Hits        10623    10623           
  Misses        161      161           
  Partials       12       12           

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[justingrant]

🎉 Congratulations Adam for great work on this polyfill!

[arshaw]

thank you @justingrant !!!