build(deps): bump step-security/harden-runner from 2.5.0 to 2.5.1

Bumps [step-security/harden-runner](https://github.com/step-security/harden-runner) from 2.5.0 to 2.5.1.
- [Release notes](https://github.com/step-security/harden-runner/releases)
- [Commits](step-security/harden-runner@cba0d00...8ca2b8b)

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/udpate-docs.yml

@@ -30,7 +30,7 @@ jobs:
     steps:
 
     - name: Harden Runner
-      uses: step-security/harden-runner@cba0d00b1fc9a034e1e642ea0f1103c282990604
+      uses: step-security/harden-runner@8ca2b8b2ece13480cda6dacd3511b49857a23c09
       with:
         egress-policy: audit # TODO: change to 'egress-policy: block' after couple of runs