corrected typo error

[Syed25794]

Closes : #436
Previous sentence in local development 8th sentence :
Your Parse Server is "not" running and is connected to your local database named dev in which the data is stored that you manage via Parse Server.

Now correct sentence:
Your Parse Server is "now" running and is connected to your local database named dev in which the data is stored that you manage via Parse Server.

[parse-github-assistant]

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