Fix typos in docs

[Desrever Nu]

TL; DR Make sure you run both the NuBits client and NuBot on a machine connected to the internet 24/7, configure NuBits client to accept RCP commands, configure NuBot, launch it and monitor it.

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Type java -version in your terminal to make sure you have JRE >= 1.8 installed on your machine, otherwise download Java JRE:1.8from oracle's download page

--- systematic RPC RCP