Update dependency composer/composer to v2.8.12 (Latest)

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This PR contains the following updates:

Package	Update	Change
composer/composer	patch	2.8.11 -> 2.8.12

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Release Notes

composer/composer (composer/composer)

v2.8.12

Compare Source

• Fixed json schema issues with version validation (#​12512)
  • Fixed PHP 8.5 deprecation warnings (#​12513)
  • Fixed support for Bitbucket API tokens (#​12515)
  • Fixed handling of spaces in paths when using binaries (#​12524)
  • Fixed config --global path resolution issue (#​12537)
  • Reduced peak memory usage while loading packages (#​12516)
  • Dropped react/promise 2.x support

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