CI: Update Windows Patches Action

[derrod]

Description

• Updates bouf version to fix pandoc conversion using the wrong input format
• Updates creation of notes file to be in line with the Sparkle variant that does include the "subject" line as a header

Motivation and Context

Improve patch notes.

How Has This Been Tested?

Hasn't.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• 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.

[RytoEX]

This change resembles my notes from yesterday, so this looks good to me.