Fix Indentation of Code Snippets in README.md

[abhishekjiitr]

Summary

Fix Indentation of Code Snippets in README.md and make it consistent with other usage which has correct indentation.

3 out of 5 total code snippets have extra indentation added, which is not consitent with the two other snippets with seemingly correct indentation in README.md

Requirements (place an x in each [ ])

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #525 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #525   +/-   ##
=======================================
  Coverage   68.89%   68.89%           
=======================================
  Files          15       15           
  Lines        1707     1707           
  Branches       96       96           
=======================================
  Hits         1176     1176           
  Misses        508      508           
  Partials       23       23

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[seratch]

LGTM. Just in case, I would like @RodneyU215 to check and merge this.

[RodneyU215]

Thanks for the PR @abhishekjiitr! This looks good to me as well.