fix(curriculum): removes redundancy and solved issue #64224

[TheMatrix31415926]

Checklist:

• [x] I have read and followed the contribution guidelines.
• [x] I have read and followed the how to open a pull request guide.
• [x] My pull request targets the main branch of freeCodeCamp.
• [x] I have tested these changes either locally on my machine, or GitHub Codespaces.

Closes #64224

(fix): Removed redundant text in the HTML abbreviation lesson explanation:

1. Removed duplicate mention of "display a dotted underline"
2. Removed unnecessary phrase "with the mouse" since hovering already implies pointer interaction

This makes the text more concise and eliminates repetition.

[gikf]

Hey @TheMatrix31415926,

could you update the PR title to follow convention from guidelines?

[TheMatrix31415926]

Done

[camper-chan[bot]]

Thank you for opening this pull request.

This is a standard message notifying you that we've reviewed your pull request and have decided not to merge it. We would welcome future pull requests from you.

Thank you and happy coding.