`@profview` not available while following instructions

[BSchilperoort]

Using Julia's REPL from within VS code, I tried to follow the exercise;

efficient-computing-in-julia/episodes/100-introduction-performance.md

Line 266 in 2672f02

@profview chudnovsky_td(big(200000))

However @profview is not available. It is also not explicitly made available with a using ... command in the instructions.

[BSchilperoort]

ProfileView.jl does make a graph, but not the same one as intended in the instructions, I think.
I am unsure when/where the VS code extension's packaged is activated in the julia environment.