Small grammar fix

public/content/about.mdx

@@ -7,7 +7,7 @@ On this site, you can find written versions of many of these lessons, often with
 
 Some lessons cover standard topics people may be searching for, such as <LessonLink id="vectors">linear algebra</LessonLink>, <LessonLink id="neural-networks">neural networks</LessonLink>, <LessonLink id="essence-of-calculus">calculus</LessonLink>, <LessonLink id="fourier-transforms">Fourier transforms</LessonLink>, <LessonLink id="light-quantum-mechanics">quantum mechanics</LessonLink> and many more.
 
-Other lessons <LessonLink id="clacks">are</LessonLink> <LessonLink id="inscribed-rectangle-problem">more</LessonLink> <LessonLink id="hardest-problem">purely</LessonLink> <LessonLink id="prime-spirals">playful</LessonLink>, exploring puzzles and problems with some intrinsic beauty, particularly those which seem quite challenging at first, but where some shift in perspective makes it both doable and beautiful.
+Other lessons <LessonLink id="clacks">are</LessonLink> <LessonLink id="inscribed-rectangle-problem">more</LessonLink> <LessonLink id="hardest-problem">purely</LessonLink> <LessonLink id="prime-spirals">playful</LessonLink>, exploring puzzles and problems with some intrinsic beauty, particularly those which seem quite challenging at first, but where some shift in perspective makes them both doable and beautiful.
 
 The first category aims to motivate math by its usefulness, and the second aims to motivate math as an art form, though of course, the line dividing these two is easily blurred.