frontend: Fix preview zoom buttons translation string

[shiina424]

Description

Fix translation string for the preview zoom button.
Follow-up to PR #12185.

Before

After

Motivation and Context

The translation string was incorrect.

How Has This Been Tested?

Tested on Windows 11 24H2 using a local build.

Types of changes

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

• 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.