The `legend` option doesn't work

The `legend` option cannot be used for legend positioning.

```
julia> versioninfo()
Julia Version 1.6.3
Commit ae8452a9e0 (2021-09-23 17:34 UTC)
Platform Info:
OS: Linux (x86_64-pc-linux-gnu)
CPU: Intel(R) Core(TM) i7-8705G CPU @ 3.10GHz
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-11.0.1 (ORCJIT, skylake)

(Graphs) pkg> st
Project Graphs v0.1.0
Status `~/Documents/PhD/code/Graphs/Project.toml`
[336ed68f] CSV v0.9.11
[f0f68f2c] PlotlyJS v0.18.8
[91a5bcdd] Plots v1.23.6
[9d95f2ec] TypedTables v1.4.0
[8bb1440f] DelimitedFiles
```

The following example from the Plots.jl docs:

```
y = rand(100)
plot(0:10:100, rand(11, 4), lab = "lines", w = 3, palette = cgrad(:grays), fill = 0, α = 0.6)
scatter!(y, zcolor = abs.(y .- 0.5), m = (:heat, 0.8, Plots.stroke(1, :green)), ms = 10 * abs.(y .- 0.5) .+ 4, lab = "grad")
```

results in the colorbar burying the legend. Trying to reposition the legend by specifying a position tuple, e.g. `legend = (0.8, 0.8)` in any or both of the plotting function calls, doesn't seem to have any effect.