chore(splunk-logging): update node version to nodejs22.x

[ganezasan]

This is a test PR to check if changing the Node version will affect the blueprint on AWS

[robertolopezlopez]

Hi @ganezasan ,

As commented before on IM, I just would like to know that you have performed

• smoke tests: manually deploy to aws lambda and verify that there are no crashes
• functional tests: using the lambda provisioned in the previous test, is there any functional change?
• local (successful) execution of automated tests included in this package.json: test, pretest and all build* targets

I think that's all. Thank you very much for your contribution :)

Roberto