Project Rock Paper Scissors: Add titles to both notes in the page

[rlujs]

Because

This PR aims to add note titles to the given markdown text to fix TOP012 warning.

This PR

• Added a title to the first note: "Important Reminder"
• Added a title to the second note: "Focus on the Task at Hand"

Issue

None

Additional Information

None

Pull Request Requirements

• I have thoroughly read and understand The Odin Project curriculum contributing guide
• The title of this PR follows the location of change: brief description of change format, e.g. Intro to HTML and CSS lesson: Fix link text
• The Because section summarizes the reason for this PR
• The This PR section has a bullet point list describing the changes in this PR
• If this PR addresses an open issue, it is linked in the Issue section
• If any lesson files are included in this PR, they have been previewed with the Markdown preview tool to ensure it is formatted correctly
• If any lesson files are included in this PR, they follow the Layout Style Guide