Update macFUSE wording

[NickWick13]

Description

Updates the outdated "FUSE for macOS" wording in the archive mount help text to the current project name, macFUSE.

Related Issue

Closes #2541

Motivation and Context

The Vorta UI currently refers to the macOS FUSE implementation as "FUSE for macOS", while the current name is macFUSE.

Updating the wording makes the UI clearer and consistent with the current macFUSE project name and Vorta's macOS documentation.

How Has This Been Tested?

This is a one-line text-only change.

Tested with:

• git diff --check
• uv run ruff check src/vorta/views/archive_tab.py
• uv run pre-commit run --all-files --show-diff-on-failure

All of these checks passed.

The full Vorta test suite was not run because this change only updates UI wording.

Screenshots (if appropriate):

Not applicable.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have read the CONTRIBUTING guide.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

I provide my contribution under the terms of the license of this repository and I affirm the Developer Certificate of Origin.