Docs: issue in command of starting elasticsearch locally

[CipherZ3r0]

Problem:

currently in docs.setup.py file in Start Elasticsearch section to start elasticsearch in windows

Windows (PowerShell):
C:\elasticsearch\bin\elasticsearch.bat 

command is written but is wrong and depends upon how user installs elasticsearch and what version user uses.

Fix:

change

Windows (PowerShell):
C:\elasticsearch\bin\elasticsearch.bat 

with

Windows (PowerShell):
C:\elasticsearch-x.x.x\bin\elasticsearch.bat  
or 
filepath of `elasticsearch.bat`

where x.x.x indicates version or file path of elasticsearch.bat. and clearly mention of this start command of elasticsearch will depend upon how user installs it.