The English first-person pronoun “I” should be capitalized.

Capitalize the standalone pronoun and its initial letter in contractions such as “I’m,” “I’ve,” “I’d,” and “I’ll.”

Example

[Verse]
you and i

[Verse]
you and I

The fix

In the workbench this finding carries one control, labelled Capitalize I. The change is contextual, so it is previewed as a diff in your document first and applies only when you confirm it.

Source

The guideline this rule enforces, as cited on every finding it reports: