[TNL-11945] chore: rename course optimizer name in dropdown

[Faraz32123]

Ticket: TNL-11945
In this PR rename Optimize Course to Course Optimizer

Before:

After:

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.45%. Comparing base (d1a6af5) to head (e0c4b28).
Report is 3 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1781   +/-   ##
=======================================
  Coverage   93.45%   93.45%           
=======================================
  Files        1120     1120           
  Lines       22730    22730           
  Branches     4916     4917    +1     
=======================================
  Hits        21243    21243           
+ Misses       1419     1411    -8     
- Partials       68       76    +8     

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