Update remaining <p> tags to use the new Typography approach.

## Feature Description

This is a follow-up issue for #10946.

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## Acceptance criteria

* Remaining occurrences of the hardcoded p tags are replaced with the new `P` component (that uses `Typography` under the hood).
* Any duplicated styles that are hardcoded for the replaced paragraphs, but now covered in Typography component styles, are removed.

## Implementation Brief

* [x] Search for remaining `

## Changelog entry

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