Sets SVG as default figure format

Specifies SVG as the default figure format in the HTML output configuration.

This ensures that figures are rendered as vector graphics, which provides better scalability and visual quality, especially when zooming or viewing on high-resolution displays.

book/config/_quarto-html.yml

@@ -486,6 +486,7 @@ format:
     footnotes-hover: false
     fig-width: 7
     fig-height: 5
+    fig-format: svg
     toc: true
     toc-depth: 4
     toc-expand: true