github-actions: bump step-security/harden-runner from 2.8.1 to 2.10.1 (…

…openthread#10855)

Bumps [step-security/harden-runner](https://github.com/step-security/harden-runner) from 2.8.1 to 2.10.1.
- [Release notes](https://github.com/step-security/harden-runner/releases)
- [Commits](step-security/harden-runner@v2.8.1...91182cc)

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

.github/workflows/toranj.yml

@@ -195,7 +195,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
     - name: Harden Runner
-      uses: step-security/harden-runner@17d0e2bd7d51742c71671bd19fa12bdc9d40a3d6 # v2.8.1
+      uses: step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7 # v2.10.1
       with:
         egress-policy: audit # TODO: change to 'egress-policy: block' after couple of runs