meta: bump step-security/harden-runner from 2.7.1 to 2.8.0

Bumps [step-security/harden-runner](https://github.com/step-security/harden-runner) from 2.7.1 to 2.8.0.
- [Release notes](https://github.com/step-security/harden-runner/releases)
- [Commits](step-security/harden-runner@a4aa98b...f086349)

---
updated-dependencies:
- dependency-name: step-security/harden-runner
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
PR-URL: #53245
Reviewed-By: Marco Ippolito <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

.github/workflows/scorecard.yml

@@ -33,7 +33,7 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@a4aa98b93cab29d9b1101a6143fb8bce00e2eac4  # v2.7.1
+        uses: step-security/harden-runner@f086349bfa2bd1361f7909c78558e816508cdc10  # v2.8.0
         with:
           egress-policy: audit  # TODO: change to 'egress-policy: block' after couple of runs