Update metaprogramming.md (#2488)
Update metaprogramming.md (#2488)

Fix a small typo `bind_quote` to `bind_quoted`.
doomspork/elixir_school,doomspork/elixir_school,doomspork/elixir-school,doomspork/elixir-school,doomspork/elixir_school,doomspork/elixir-school