ci: fix script

Author: AuHau

.github/workflows/generate.yml

@@ -29,6 +29,7 @@ jobs:
             echo "OPENAPI_URL=${{ github.event.client_payload.openapi_url }}" >> $GITHUB_ENV
           else
             echo "OPENAPI_URL=${{ github.event.inputs.openapi_url }}" >> $GITHUB_ENV
+          fi
 
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v4