[trivial] hotfix for missing std

[Yurlungur]

PR Summary

My recent cleanup #576 broke the CI by pulling some math.h functions out of public namespace. This MR should hopefully resolve the issue.

PR Checklist

• Adds a test for any bugs fixed. Adds tests for new features.
• Format your changes by using the make format command after configuring with cmake.
• Document any new features, update documentation for changes made.
• Make sure the copyright notice on any files you modified is up to date.
• After creating a pull request, note it in the CHANGELOG.md file.
• LANL employees: make sure tests pass both on the github CI and on the Darwin CI

If preparing for a new release, in addition please check the following:

• Update the version in cmake.
• Move the changes in the CHANGELOG.md file under a new header for the new release, and reset the categories.
• Ensure that any when='@main' dependencies are updated to the release version in the package.py

[jhp-lanl]

This appears to fix the issues we were seeing in the gitlab CI. I'm merging since the remaining CI jobs weren't affected and are hung at the batch submission stage (so they'll likely fail anyway).