Fix typo in flowchart.md (Closes #163)

[saienjoy0]

Fixes #

Short description of what this resolves:

Closes #163

What Changes proposed in this pull request:

Checklist

• [x] 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
• [x] PR title follows semantic commit guidelines
• [x] Search previous suggestions before making a new one, as yours may be a duplicate.
• [x] I acknowledge that all my contributions will be made under the project's license.

Notes:

[saienjoy0]

Hi, I've fixed a small typo in flowchart.md (#163).
Please review this PR when you have time. Thank you!