docs: added clippy to checks

[bednar]

Checklist

• [x] CHANGELOG.md updated
• [x] Rebased/mergeable
• [x] A test has been added if appropriate
• [x] make check completes successfully
• [x] Commit messages are in semantic format
• [x] Sign CLA (if not already signed)

[codecov[bot]]

Codecov Report

Merging #4 into master will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##            master        #4   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines            2         2           
=========================================
  Hits             2         2           

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