Description of Change

fix typos in comments of leetcode/src/3.c

References

Checklist

• Added description of change
• 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:
fix typos in comments of leetcode/src/3.c