build(deps): bump step-security/harden-runner from 2.2.1 to 2.3.0 (#233)

Bumps [step-security/harden-runner](https://github.com/step-security/harden-runner) from 2.2.1 to 2.3.0.
- [Release notes](https://github.com/step-security/harden-runner/releases)
- [Commits](step-security/harden-runner@1f99358...03bee39)

---
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/udpate-docs.yml

@@ -30,7 +30,7 @@ jobs:
     steps:
 
     - name: Harden Runner
-      uses: step-security/harden-runner@1f99358870fe1c846a3ccba386cc2b2246836776
+      uses: step-security/harden-runner@03bee3930647ebbf994244c21ddbc0d4933aab4f
       with:
         egress-policy: audit # TODO: change to 'egress-policy: block' after couple of runs