deps.windows: Update VPL to v2.12.0

[thyintel]

Description

Updating VPL to the most recent version v2.12.0 for current and future PRs.

Motivation and Context

Update is needed for https://github.com/obsproject/obs-studio/pull/10902/files.

How Has This Been Tested?

Types of changes

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

Checklist:

• [ x] 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.

[RytoEX]

This looks fine at a glance. I haven't tested this change against OBS Studio, but I will do that when I do a full deps test.