README.md: Update grammar at line 97

[utkarsh2102]

Under Phase 4, it says:
For avoid these influences causing incorrect design decisions in coAST ...

For avoid doesn't look quite right and hence is to be updated.

A good newcomer issue.

[Anmolbansal1]

Can i work on this Issue?

[li-boxuan]

@Anmolbansal1 This a newcomer issue and you may want to find harder ones

[Marco2018]

Can I work on this issue? I am a newcomer on this project. I think it is a good issue to start. THX

[tarunlunkar]

can i start this issue? I am new to open source.