Update dry_run input

Author: shaun-nx

.github/workflows/ci.yml

@@ -412,7 +412,7 @@ jobs:
   openshift-certification:
     name: OpenShift Certification
     needs: [build-oss, build-plus, build-operator]
-    if: ${{ inputs.dry_run == false || inputs.dry_run == null) }}
+    if: ${{ inputs.dry_run || false }}
     uses: ./.github/workflows/openshift-certification.yml
     with:
       runner: ${{ github.repository_owner == 'nginx' && (inputs.is_production_release || (github.event_name == 'push' && github.ref == 'refs/heads/main')) && 'ubuntu-24.04-amd64' || 'ubuntu-24.04' }}