Improve README documentation clarity

[amahi1568]

This pull request improves the clarity of the README documentation by refining wording.
No functional or behavioral changes are introduced.

Checklist:

• This pull request addresses just one issue and does not include unrelated changes.
• Each commit has a meaningful subject and body.
• Unit tests were added or updated where applicable (not applicable for documentation-only changes).
• mvn verify was run (not required for documentation-only changes).
• Core ITs were run (not applicable).

Licensing:

• I hereby declare this contribution to be licensed under the Apache License Version 2.0, January 2004.
• In any other case, an Apache Individual Contributor License Agreement (ICLA) has been filed.