Celcius to Fahrenheit and Fahrenheit to Celcius

[aishwarya0918]

Fix to Issue #

===============================

===============================

Checklist

• [ ] I read the contributing guidelines
• [ ] I structured my project as stated in the contributing guidelines
• [ ] My project uses dependencies
• [ ] I starred the repo
• [ ] I had fun contributing!

[theadeyemiolayinka]

Thanks mate! Feel free to add more projects.