Typo fix

public/content/lessons/2017/leibniz-formula/index.mdx

@@ -1,6 +1,6 @@
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 title: Pi hiding in prime regularities
-description: A beutiful derivation of a formula for pi.  At first, 1-1/3+1/5-1/7+1/9-.... seems unrelated to circles, but in fact there is a circle hiding here, as well as some interesting facts about prime numbers in the context of complex numbers.
+description: A beautiful derivation of a formula for pi.  At first, 1-1/3+1/5-1/7+1/9-.... seems unrelated to circles, but in fact, there is a circle hiding here, as well as some interesting facts about prime numbers in the context of complex numbers.
 date: 2017-05-19
 video: NaL_Cb42WyY
 source: _2017/leibniz.py