Remove whitespaces in Readme.md

[Akash3121]

Remove white spaces in step 6 in Installation: https://github.com/Akash3121/github-stats-1/blob/master/README.md#installation
i.e., an extra line

[Akash3121]

please assign this issue to me, so that I can create a PR to resolve this extra whitespace.