Bump actions/attest-sbom from 2.2.0 to 2.4.0 (elixir-lang#14582)

Bumps [actions/attest-sbom](https://github.com/actions/attest-sbom) from 2.2.0 to 2.4.0.
- [Release notes](https://github.com/actions/attest-sbom/releases)
- [Changelog](https://github.com/actions/attest-sbom/blob/main/RELEASE.md)
- [Commits](actions/attest-sbom@115c3be...bd218ad)

---
updated-dependencies:
- dependency-name: actions/attest-sbom
  dependency-version: 2.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

.github/workflows/release.yml

@@ -218,7 +218,7 @@ jobs:
 
       - name: Attest Distribution Assets with SBoM
         id: attest-sbom
-        uses: actions/attest-sbom@115c3be05ff3974bcbd596578934b3f9ce39bf68 # v2.2.0
+        uses: actions/attest-sbom@bd218ad0dbcb3e146bd073d1d9c6d78e08aa8a0b # v2.4.0
         with:
           subject-path: |
             /tmp/build-artifacts/{elixir-otp-*.*,Docs.zip}