Fix makefile in docs section for html pages

[aayush-jaiswal]

Description

Fixes issue #117

Have you tested this? If so, how?

Ran make html and docs generated

Checklist for PR author(s)

• Changes are covered by unit tests (no major decrease in code coverage %).
• All tests pass.
• Docstring coverage is 100% via interrogate drf_user (I mean, we should set a good example 😄).
• Updates to documentation:
  • Document any relevant additions/changes in README.md.
  • Manually update both the README.md and docs/index.rst for any new changes.
  • Any changed/added classes/methods/functions have appropriate versionadded, versionchanged, or deprecated directives. Find the appropriate next version in the project's __init__.py file.

[codecov]

Codecov Report

Merging #122 (f3dfd64) into master (887a312) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #122   +/-   ##
=======================================
  Coverage   95.68%   95.68%           
=======================================
  Files          20       20           
  Lines         649      649           
=======================================
  Hits          621      621           
  Misses         28       28           

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[sumit4613]

LGTM 💯 Thanks @aayush-jaiswal for working on this.