Bump step-security/harden-runner from 2.12.2 to 2.13.1 (open-telemetry#3671)

Bumps [step-security/harden-runner](https://github.com/step-security/harden-runner) from 2.12.2 to 2.13.1.
- [Release notes](https://github.com/step-security/harden-runner/releases)
- [Commits](step-security/harden-runner@v2.12.2...f4a75cf)

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

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -191,7 +191,7 @@ jobs:
       CXX_STANDARD: '14'
     steps:
     - name: Harden the runner (Audit all outbound calls)
-      uses: step-security/harden-runner@6c439dc8bdf85cadbbce9ed30d1c7b959517bc49 # v2.12.2
+      uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
       with:
         egress-policy: audit
     - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2