chore(deps): update step-security/harden-runner action to v2.19.4 (#267)

Author: renovate[bot]

.github/workflows/checks.yaml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Harden the runner (Audit all outbound calls)
-      uses: step-security/harden-runner@ab7a9404c0f3da075243ca237b5fac12c98deaa5 # v2.19.3
+      uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
       with:
         egress-policy: audit