Warning helpboxes in the Search Indexing tab in the Preferences window do not meet the new 6.5 helpbox standard

Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Open the Preferences window (Unity > Settings)
3. Open the "Indexing" tab in the Preferences window under the "Search" tab
4. Observe the warning helpboxes

Actual results: The helpboxes do not meet the 6.5 helpbox standard, the icons are too big and not positioned properly

Expected results: The helpboxes meet the 6.5 helpbox standard, the icons are smaller and positioned top left

Reproducible with versions: 6000.5.0a6

Can’t test with versions: 6000.0.67f1, 6000.3.7f1, 6000.4.0b7 (due to different helpbox standards)

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