Rollup merge of #144913 - GuillaumeGomez:fix-wrong-i-icon, r=fmease

[rustdoc] Fix wrong `i` tooltip icon

Current wrong display:

<img width="334" height="37" alt="Screenshot From 2025-08-04 17-42-38" src="https://github.com/user-attachments/assets/57046475-6162-487f-998f-ebb2434c111d" />

With the fix:

<img width="334" height="37" alt="image" src="https://github.com/user-attachments/assets/e761a103-dc39-4e30-8c8e-cfc7fab52fde" />

r? ``@fmease``

Author: Kobzol