Update templating.md - fixed a little typo

[joshkautz]

Fix typo

Summary

Proposed change:

Closes # .

Checklist

I've completed the checklist below to ensure I didn't forget anything. This makes reviewing this PR as easy as possible for the maintainers. And it gets this change released as soon as possible.

• [x] Proposed change helps towards purpose of this project.
• [x] Documentation is added / updated to describe proposed change.
• [x] Tests are added / updated to cover proposed change.
• [x] Changelog has an entry for proposed change (if user-facing fix or feature).