Improve introduction wording for clarity

[KonstantinKulagin]

Type of changes

• Bug fix
• New feature
• Documentation / docstrings
• Tests
• Other

AI?

• AI was used to generate this PR

AI generated PRs may be accepted, but only if @willmcgugan has responded on an issue or discussion.

Checklist

• I've run the latest black with default args on new code.
• I've updated CHANGELOG.md and CONTRIBUTORS.md where appropriate (see note about typos above).
• I've added tests for new code.
• I accept that @willmcgugan may be pedantic in the code review.

Description

This PR improves the clarity of the introduction section by slightly rephrasing
the demo description to make it more readable and beginner-friendly.

Important: Link to an issue or discussion regarding these changes.