Fix grammar in Hello World README

[dipkumarexperiment08-rgb]

Corrected minor grammatical errors and improved clarity in the README.

Because

This PR

Issue

Closes #XXXXX

Additional Information

Pull Request Requirements

• I have thoroughly read and understand The Odin Project Contributing Guide
• The title of this PR follows the location of change: brief description of change format, e.g. 01_helloWorld: Update test cases
• The Because section summarizes the reason for this PR
• The This PR section has a bullet point list describing the changes in this PR
• If this PR addresses an open issue, it is linked in the Issue section
• If this PR includes any changes that affect the solution of an exercise, I've also updated the solution in the /solutions folder

[mao-sz]

Should actually be a comma instead of double full stop.

Suggested change

	For the most part we've set up these tests in such a way that you only have to update or write the code being tested. You should not have to worry about importing or exporting anything at this stage. So just work around that bit of the code and write what it takes to make them pass!
	For the most part we've set up these tests in such a way that you only have to update or write the code being tested. You should not have to worry about importing or exporting anything at this stage, so just work around that bit of the code and write what it takes to make them pass!