Change deprecated kwarg in docs

Quick Start docs previously used a deprecated kwarg in the
visualize section. The deprecated kwarg, `resolution`, is swapped
for `shape`

docs/src/index.md

@@ -151,7 +151,7 @@ If we want to make a heatmap for `ta_max` at time of 100 s at altitude `z` of 30
 import CairoMakie
 import ClimaAnalysis.Visualize as viz
 
-fig = Makie.Figure(resolution = (400, 600))
+fig = Makie.Figure(size = (400, 600))
 
 viz.plot!(
   fig,