Bump actions/attest from 4.2.0 to 4.2.1 in the actions-minor group (#862)

Bumps the actions-minor group with 1 update: [actions/attest](https://github.com/actions/attest).


Updates `actions/attest` from 4.2.0 to 4.2.1
- [Release notes](https://github.com/actions/attest/releases)
- [Changelog](https://github.com/actions/attest/blob/main/RELEASE.md)
- [Commits](https://github.com/actions/attest/compare/f7c74d28b9d84cb8768d0b8ca14a4bac6ef463e6...508db95dd578ae2727ebd6217d5ba78e4fbda05d)

---
updated-dependencies:
- dependency-name: actions/attest
  dependency-version: 4.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: actions-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

action.yml

@@ -92,7 +92,7 @@ runs:
       id: attest
       env:
         NODE_OPTIONS: "--max-http-header-size=32768"
-      uses: actions/attest@f7c74d28b9d84cb8768d0b8ca14a4bac6ef463e6 # v4.2.0
+      uses: actions/attest@508db95dd578ae2727ebd6217d5ba78e4fbda05d # v4.2.1
       with:
         subject-path: ${{ inputs.subject-path }}
         subject-name: ${{ inputs.subject-name }}