Update nf-processenv-setenvironmentstringsa.md

[Karl-Bridge-Microsoft]

reflect updates submitted in #2052 for nf-processenv-setenvironmentstringsw

[prmerger-automator]

Microsoft authors of articles need to make updates through the private repository, so the updates can be staged and validated by current validation rules. After you review staging and fix all validation issues, you can add the sign-off comment to let the PR reviewers know the updates are ready to be merged.

It's easy to access the private repo version of your articles in GitHub. Just add -pr to the URL, as follows:

 Public repo URL: https://github.com/MicrosoftDocs/{docs-repo}
 Private repo URL: https://github.com/MicrosoftDocs/{docs-repo-pr}

We have closed this pull request. Please resubmit the updates through the private repo. For more information, see the contributor guide.