Mixers do not have "Rename" in the right-click context menu when a Mixer is right-clicked in the Audio Mixer window

Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Open the Audio Mixer window (Window > Audio > Audio Mixer)
3. Create a new Mixer by pressing the "+" button in the Audio Mixer window
4. Right-click the newly created Mixer
5. Observe the context menu

Actual results: There is no rename option

Expected results: There is a rename option

Reproducible with versions: 6000.0.67f1, 6000.3.8f1, 6000.4.0b8, 6000.5.0a6

Tested on (OS): MacOS Silicon Tahoe 26.2, Ubuntu 24.04

Notes:

• Snapshots, Groups, and Views have the "Rename" option in the context menu, the Mixers are the only ones that have to be double-clicked to rename