Update README.md - Some changes to make the meaning of sentences more clear, and general concision / redundancy removal. :)

[ghost]

Line 51:

• Removed "find something to work on", replaced with "To contribute, " in next sentence
• Removed "you can", since the sentence is already directed at the reader so it can be made implicit
• Changed the commas to brackets, replaced "if there are any" with "if any exist" (it's a bit shorter and more concise)
• Changed the comma list into a new sentence, to make the whole sentence make sense in its new context
• Merged the last 2 sentences

Line 53:

• "or other ways to improve issuehub" - This sentence is a bit confusing to me, so I reworded it!
• "or if you would like to improve issuehub in other ways", I think this makes the intent of this clause more clear to readers, at the cost of adding more words

[despo]

👍