Update keyword colors | Chapter 2

[Hadrien-lcrx]

In NULL and IS NULL, and LIKE and NOT LIKE, all SQL keywords should probably appear in blue. This happens when using the NOT keyword as well.

These are the exercises where these keywords are introduced, but it seems to me the color issue is arises on all SQL exercises where these keywords are used, like Sorting single columns (2) where LIKE and IN remain black.

Screenshots

Cf [email protected], #65775 Cc @bakera81