feat(templates): update sdk to v1.0.0

[github-actions]

Update the SDK version used by the templates

[vdice]

We can either merge this to main as currently config'd and backport to v1.0 or merge into v1.0 and then do the same updates manually on main. The changes themselves would obviously be equivalent but the automated templates tag generation that occurs after the merge event differs (for the former, a tag is cut from main, the latter v1.0).

Technically we'd want the tag to be cut on v1.0, in case there were any unreleased template or sdk changes on main not intended for the release branch. So, I've updated the base to v1.0. I can help with a follow-up PR to rev the versions on main. Okay, so I tried updating the base to v1.0 but then the commits were crazy with conflicts. I think we'll have to go back to the drawing board on how we'll want to do this properly. In this case, there aren't any new template or SDK changes between main and v1.0, so we're good to merge to main and backport.