Change capitalization of Project Manager

[JohnVeness]

I have made the capitalization of Project Manager consistent throughout the documentation.

I hope this sort of blanket commit across the whole of docs is OK. If so, I will likely do similar PRs for "Asset Library" and others.

[mhilbrunner]

Thanks, merged!

I hope this sort of blanket commit across the whole of docs is OK. If so, I will likely do similar PRs for "Asset Library" and others.

Sure (as long as it doesn't touch the class reference; that needs to be edited in the main repo's XML files). Consistency is nice, if maybe not the most critical thing :) Thanks for contributing!
It may also make sense to investigate if we can add "Asset Library" and "Project Manager" to the spelling dict that is automatically checked on commits/PRs, and whether they have many false positives - could be a way to prevent these from cropping up again in the future.