Bump step-security/harden-runner from 2.13.3 to 2.14.0 (#410)

Bumps [step-security/harden-runner](https://github.com/step-security/harden-runner) from 2.13.3 to 2.14.0.
- [Release notes](https://github.com/step-security/harden-runner/releases)
- [Commits](step-security/harden-runner@df199fb...20cf305)

---
updated-dependencies:
- dependency-name: step-security/harden-runner
  dependency-version: 2.14.0
  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/build.yml

@@ -34,7 +34,7 @@ jobs:
     runs-on: ${{ matrix.os }}-latest
     steps:
     - name: Harden Runner
-      uses: step-security/harden-runner@df199fb7be9f65074067a9eb93f12bb4c5547cf2
+      uses: step-security/harden-runner@20cf305ff2072d973412fa9b1e3a4f227bda3c76
       with:
         egress-policy: audit
     - name: Checkout repository