Further improve 2005/boutines/try.sh

Add link to FAQ about ImageMagick. The README.md also links to this.

2005/boutines/README.md

@@ -9,6 +9,8 @@ make
 
 You will need an [SVG](https://www.w3.org/TR/SVG11/expanded-toc.html) viewer or
 a converter like [ImageMagick](https://imagemagick.org/index.php)'s `convert`.
+See [FAQ 3.17 - How do I compile and install ImageMagick for entries that
+require it?](/faq.md#imagemagick).
 
 Look here to find some [SVG Viewer
 Implementations](https://www.w3.org/Graphics/SVG/WG/wiki/Implementations).