Fix typo in comment

[umlaeute]

• Related: https://github.com/obsproject/obs-studio/issues/11160

Description

Fixes a spelling mistakes in comments

Motivation and Context

Proper English makes log-messages, documentation and code more readable.

How Has This Been Tested?

still builds

Types of changes

• Code cleanup (non-breaking change which makes code smaller or more readable)

Checklist:

• [ ] My code has been run through clang-format.
• [x] I have read the contributing document.
• [x] My code is not on the master branch.
• [x] The code has been tested.
• [x] All commit messages are properly formatted and commits squashed where appropriate.
• [x] I have included updates to all appropriate documentation.