fix(curriculum): fix code blocks for css example in minmax function lesson (freeCodeCamp#64731)

Author: pdtrang

curriculum/challenges/english/blocks/lecture-working-with-css-grid/673226a62eb2121da41a3d68.md

@@ -63,7 +63,7 @@ Let's look at a practical example:
 
 What's happening here? 
 
-The first `column, minmax(150px, 300px)`, will always be at least `150px` and at most `300px`, depending on the available space.
+The first column, `minmax(150px, 300px)`, will always be at least `150px` and at most `300px`, depending on the available space.
 
 On the other hand, the second column, `1fr`, will take up any available remaining space in the grid container since there are no additional columns to share the space with.