Bump step-security/harden-runner from 2.13.0 to 2.13.1

Bumps [step-security/harden-runner](https://github.com/step-security/harden-runner) from 2.13.0 to 2.13.1.
- [Release notes](https://github.com/step-security/harden-runner/releases)
- [Commits](step-security/harden-runner@ec9f2d5...f4a75cf)

---
updated-dependencies:
- dependency-name: step-security/harden-runner
  dependency-version: 2.13.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/test.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy: {matrix: {ruby: [ '3.0', 3.1, 3.2, 3.3, 3.4 ]}}
     steps:
-      - uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+      - uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
         with: { egress-policy: audit }
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - uses: ruby/setup-ruby@a4effe49ee8ee5b8b5091268c473a4628afb5651 # v1.245.0