Check all spelling and typo in core java folder main readme.md

[shreeshailaya]

Check all spelling and typos in the Core Java folder main readme.md you can also check for small typos in it.

[ManasviGoyal]

I would like to work on it

[semnim]

Is this about the readme.md only or about all subfolders of the Core Java folder?

[shreeshailaya]

@semnim only for the core java folder readme but @ManasviGoyal already take this task you can check another issue else create your own ...