Update sigstore/gh-action-sigstore-python action to v3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
sigstore/gh-action-sigstore-python	action	major	v2.1.1 -> v3.0.0

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Release Notes

sigstore/gh-action-sigstore-python (sigstore/gh-action-sigstore-python)

v3.0.0

Compare Source

Added

• inputs now allows recursive globbing with **
  (#​106)

Removed

• The following settings have been removed: fulcio-url, rekor-url,
  ctfe, rekor-root-pubkey
  (#​140)
• The following output settings have been removed: signature,
  certificate, bundle
  (#​146)

Changed

• inputs is now parsed according to POSIX shell lexing rules, improving
  the action's consistency when used with filenames containing whitespace
  or other significant characters
  (#​104)

• inputs is now optional if release-signing-artifacts is true
  and the action's event is a release event. In this case, the action
  takes no explicit inputs, but signs the source archives already attached
  to the associated release
  (#​110)

• The default suffix has changed from .sigstore to .sigstore.json,
  per Sigstore's client specification
  (#​140)

• release-signing-artifacts now defaults to true
  (#​142)

Fixed

• The release-signing-artifacts setting no longer causes a hard error
  when used under the incorrect event
  (#​103)

• Various deprecations present in sigstore-python's 2.x series have been
  resolved
  (#​140)

• This workflow now supports CI runners that use PEP 668 to constrain global
  package prefixes
  (#​145)

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