Typo in High Score Board Introduction

[RemyXRenard]

There is a minor typo In the README for the High Score Board exercise where Avogadro's number is used as one of the constants.

Line 16: let constants = ["pi": 3.14159, "e": 2.71828, "phi": 1.618033, "avogadro": 6.02214076e22]
Line 85: // => [(key "e", value 2.71828), (key "phi", value 1.618033), (key "pi", value 3.14159), (key "avogadro", value 6.02214076e+22)]

The correct value for the exponent at the end of line 16 and line 85 should be e23, not e22.

So, the proposed update would be:

Line 16: let constants = ["pi": 3.14159, "e": 2.71828, "phi": 1.618033, "avogadro": 6.02214076e23]
Line 85: // => [(key "e", value 2.71828), (key "phi", value 1.618033), (key "pi", value 3.14159), (key "avogadro", value 6.02214076e+23)]

Thanks. Chemistry teachers everywhere will appreciate the update!