Multiplayer Matchmaker Environment (.mme) asset opens the default mail client when selecting "Open" in the Project window

How to reproduce:
1. Create a new Unity project and install the Multiplayer Services package
2. In the Project window, right-click -> Create -> Services -> Marchmaker Environment Config
3. Right-click on the created Asset -> Open
4. Observe the results

Expected results: The Asset is opened inside the Editor by focusing it in the Inspector
Actual results: The PC default mail app opens because Unity delegates the opening to the OS

Reproducible with: 2.2.3 (6000.4.12f1, 6000.5.0b11, 6000.6.0a7)

Reproducible on: macOS Tahoe 26 (M1)
Not reproducible on: No other environment tested

Note:
Since .mme format is Unity-specific, it shouldn't be opened by OS