fix(components): [upload] icon style abnormal

[betavs]

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Description

🤖 Generated by Copilot at 04ad110

Fixed upload icon alignment issue by adding a selector to i element in upload.scss. This prevents conflicts with other icons in the upload component.

Related Issue

Fixes #14469

Explanation of Changes

🤖 Generated by Copilot at 04ad110

• Fix the upload icon alignment issue ( [Bug Report] el-input-number with double touch on trackpad will increase for twice #3354) by adding a more specific selector to the i element (link) in upload.scss

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