Update Node version to resolve error running pipeline. (#27525)
### Description
<!-- Describe your changes. -->
Update to v20 to resolve error.
https://github.com/microsoft/onnxruntime/actions/runs/22604054137/job/65492149800#step:6:15
```
npm ERR! notsup Not compatible with your version of node/npm: xmlbuilder2@4.0.3
npm ERR! notsup Required: {"node":">=20.0"}
npm ERR! notsup Actual: {"npm":"9.6.3","node":"v19.9.0"}
```
### Motivation and Context
<!-- - Why is this change required? What problem does it solve?
- If it fixes an open issue, please link to the issue here. -->