chore(deps): update slsa-framework/slsa-github-generator action to v1.6.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
slsa-framework/slsa-github-generator	action	minor	v1.5.0 -> v1.6.0

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Release Notes

slsa-framework/slsa-github-generator

v1.6.0

Compare Source

This release includes the first beta release of the
Node.js builder.
The Node.js builder provides a GitHub Actions reusable workflow that can be
called to build a Node.js package, generate SLSA Build L3 compliant provenance,
and publish it to the npm registry along with the package.

Summary of changes

Go builder

New Features

• A new
  prerelease
  input was added to allow users to create releases marked as prerelease when
  upload-assets is set to true.
• A new input draft-release was added to allow users to create releases marked
  as draft when upload-assets is set to true.
• A new output go-provenance-name added which can be used to retrieve the name
  of the provenance file generated by the builder.

Generic generator

New Features

• A new input draft-release was added to allow users to create releases marked
  as draft when upload-assets is set to true.

Container generator

The Container Generator was updated to use cosign v2.0.0. No changes to the
workflow's inputs or outputs were made.

Changelog since v1.5.0

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Configuration

📅 Schedule: Branch creation - "every weekend" in timezone Europe/Prague, Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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