Fix typoe in comment in README (#175)

Author: nathanrboyer

README.md

@@ -29,7 +29,7 @@ julia> @b rand(1000) hash # How long does it take to hash that array?
 julia> @b rand(1000) _.*5 # How long does it take to multiply it by 5 element wise?
 172.970 ns (3 allocs: 7.875 KiB)
 
-julia> @b rand(100,100) inv,_^2,sum # Is it be faster to invert, square, or sum a matrix? [THIS USAGE IS EXPERIMENTAL]
+julia> @b rand(100,100) inv,_^2,sum # Is it faster to invert, square, or sum a matrix? [THIS USAGE IS EXPERIMENTAL]
 (92.917 μs (9 allocs: 129.203 KiB), 27.166 μs (3 allocs: 78.203 KiB), 1.083 μs)
 ```