meta: bump step-security/harden-runner from 2.5.1 to 2.6.0

Bumps [step-security/harden-runner](https://github.com/step-security/harden-runner) from 2.5.1 to 2.6.0.
- [Release notes](https://github.com/step-security/harden-runner/releases)
- [Commits](step-security/harden-runner@8ca2b8b...1b05615)

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

Signed-off-by: dependabot[bot] <support@github.com>
PR-URL: #50512
Reviewed-By: Tierney Cyren <hello@bnb.im>
Reviewed-By: James M Snell <jasnell@gmail.com>

.github/workflows/scorecard.yml

@@ -33,7 +33,7 @@ jobs:
 
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@8ca2b8b2ece13480cda6dacd3511b49857a23c09  # v2.5.1
+        uses: step-security/harden-runner@1b05615854632b887b69ae1be8cbefe72d3ae423  # v2.6.0
         with:
           egress-policy: audit  # TODO: change to 'egress-policy: block' after couple of runs