libobs-winrt: Prevent hard cap of 60 fps for WGC capture

[Skajdrowski]

Description

By overriding WGC’s default pacing with 'MinUpdateInterval' (introduced in Windows build 26100), OBS avoids the compositor’s conservative frame-delivery interval and unlocks higher capture rates, aligning frame arrival frequency with the framerate we request via OBS settings.

Motivation and Context

Windows 10 capture helps with recording stuff that is not compatible with regular Game Capture method, but currently is limited to 60 fps, which is really inconvenient for people who might wanna use higher framerates.

How Has This Been Tested?

By checking video footage frame-by-frame
RTX 4060, Windows 11 24H2

Types of changes

• Tweak (non-breaking change to improve existing functionality)

Checklist:

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