linux-capture: Rename Screen Capture as Display Capture

[tytan652]

Description

Fix the naming

Motivation and Context

The source is wrongly named. Source: Warchamp7

How Has This Been Tested?

New wording is shown.

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.