🌱 Bump step-security/harden-runner from 2.3.0 to 2.3.1

Bumps [step-security/harden-runner](https://github.com/step-security/harden-runner) from 2.3.0 to 2.3.1.
- [Release notes](https://github.com/step-security/harden-runner/releases)
- [Commits](step-security/harden-runner@03bee39...6b3083a)

---
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/dependency-review.yml

@@ -31,7 +31,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden Runner
-        uses: step-security/harden-runner@03bee3930647ebbf994244c21ddbc0d4933aab4f
+        uses: step-security/harden-runner@6b3083af2869dc3314a0257a42f4af696cc79ba3
         with:
           egress-policy: audit # TODO: change to 'egress-policy: block' after couple of runs