Update README.

Author: trekhleb

README.md

@@ -53,7 +53,7 @@ a set of rules that precisely define a sequence of operations.
 *[Integer Partition](https://github.com/trekhleb/javascript-algorithms/tree/master/src/algorithms/math/integer-partition)
 *[Sieve of Eratosthenes](https://github.com/trekhleb/javascript-algorithms/tree/master/src/algorithms/math/sieve-of-eratosthenes) - finding all prime numbers up to any given limit
 *[Is Power of Two](https://github.com/trekhleb/javascript-algorithms/tree/master/src/algorithms/math/is-power-of-two) - check if the number is power of two (naive and bitwise algorithms)
-*[Liu Hui π Algorithm](https://github.com/trekhleb/javascript-algorithms/tree/master/src/algorithms/math/liu-hui) - approximate π calculations based on N-gons.
+*[Liu Hui π Algorithm](https://github.com/trekhleb/javascript-algorithms/tree/master/src/algorithms/math/liu-hui) - approximate π calculations based on N-gons
 ***Sets**
 *[Cartesian Product](https://github.com/trekhleb/javascript-algorithms/tree/master/src/algorithms/sets/cartesian-product) - product of multiple sets
 *[Power Set](https://github.com/trekhleb/javascript-algorithms/tree/master/src/algorithms/sets/power-set) - all subsets of a set