Pythagorean Triplet: ask for triplet instead of product (#2344)

* Pythagorean Triplet asks for triplet instead of product.

Author: keiravillekode

exercises/pythagorean-triplet/metadata.toml

@@ -1,4 +1,4 @@
 title = "Pythagorean Triplet"
-blurb = "There exists exactly one Pythagorean triplet for which a + b + c = 1000. Find the product a * b * c."
+blurb = "There exists exactly one Pythagorean triplet for which a + b + c = 1000. Find the triplet."
 source = "Problem 9 at Project Euler"
 source_url = "https://projecteuler.net/problem=9"