Bump step-security/harden-runner from 2.13.0 to 2.13.3

Bumps [step-security/harden-runner](https://github.com/step-security/harden-runner) from 2.13.0 to 2.13.3.
- [Release notes](https://github.com/step-security/harden-runner/releases)
- [Commits](step-security/harden-runner@ec9f2d5...df199fb)

---
updated-dependencies:
- dependency-name: step-security/harden-runner
  dependency-version: 2.13.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/push_gem.yml

@@ -22,7 +22,7 @@ jobs:
     steps:
       # Set up
       - name: Harden Runner
-        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        uses: step-security/harden-runner@df199fb7be9f65074067a9eb93f12bb4c5547cf2 # v2.13.3
         with:
           egress-policy: audit