fix link (#15)

Author: SimonDanisch

src/pages/blogposts/v0.19.7/v0.19.7.md

@@ -48,7 +48,7 @@ f
 
 This work by Daniel switched the internal handler of triangulation computations in Makie from jll-based MiniQHull to his own package [DelaunayTriangulation.jl](https://github.com/DanielVandH/DelaunayTriangulation.jl/) written completely in Julia. This allows users to exert much more control over the triangulations used for their `tricontourf` plots.
 
-![](https://docs.makie.org/stable/assets/examples/plotting_functions/tricontourf/code/output/example_18344521001915792531.svg)
+![](https://docs.makie.org/v0.21/assets/f2c1fac.CoqexF4t.png)
 
 
 Here's a more comprehensive list of changes which can also be found at [docs.makie.org/stable/news/](https://docs.makie.org/stable/news/).