add harjun751 as a contributor for doc

[allcontributors]

Adds @Harjun751 as a contributor for doc.

This was requested by gerteck in this comment

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 71.67%. Comparing base (c86ed07) to head (fab9f9e).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2787   +/-   ##
=======================================
  Coverage   71.67%   71.67%           
=======================================
  Files         134      134           
  Lines        7284     7284           
  Branches     1516     1607   +91     
=======================================
  Hits         5221     5221           
- Misses       1936     2017   +81     
+ Partials      127       46   -81     

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[gerteck]

LGTM

[github-actions]

@gerteck Each PR must have a SEMVER impact label, please remember to label the PR properly.