Fix typo in "reccomend_textbook"

[subashravichandran]

Description

This change fixes the typo of a column in review table and correcting the same in different files wherever it is being used.

[codecov]

Codecov Report

Merging #95 (1995fbb) into main (8899648) will not change coverage.
The diff coverage is 50.00%.

Additional details and impacted files

Impacted Files	Coverage Δ
app/controllers/checkouts_controller.rb	0.00% <0.00%> (ø)
app/controllers/reviews_controller.rb	97.10% <ø> (ø)
app/helpers/course_helper.rb	90.66% <ø> (ø)
app/models/review.rb	94.73% <100.00%> (ø)