Fix typos in docs

[jdebacker]

This PR fixes typos in some equations in the CCC guide.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.91%. Comparing base (dfec554) to head (5502536).
Report is 4 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #399   +/-   ##
=======================================
  Coverage   99.91%   99.91%           
=======================================
  Files          11       11           
  Lines        1133     1133           
=======================================
  Hits         1132     1132           
  Misses          1        1           

Flag	Coverage Δ
unittests	99.91% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

---- 🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests