Create LuckyNumbers.md

[agaramudhala]

Please review and merge with Hacktoberfest tag

Fixes #

LuckyNumbers

What Changes proposed in this pull request:

• // n: Input n
• // Return True if the given number is a lucky number else return False

Checklist

• Added description of change
• Added file name matches File name guidelines
• Added code examples, test must pass
• Added documentation so that the program is self-explanatory and educational.
• Relevant documentation/comments is changed or added
• PR title follows semantic commit guidelines
• Search previous suggestions before making a new one, as yours may be a duplicate.
• I acknowledge that all my contributions will be made under the project's license.

Notes:

[agaramudhala]

please review @Utkarshsingh70