docs: update image optimisation setting to indicate potential impact on build speed

hugo.toml

@@ -1096,7 +1096,7 @@ userId = ""
 [params.image]
 # cache remote images for better optimisations
 cacheRemote = false
-# Image resizing and optimisation
+# Image resizing and optimisation (may slow builds)
 optimise = false
 # FixIt 0.4.0 | NEW A list of image file names or patterns to exclude from optimisation
 # e.g. ["no-optimize.jpg", "*.tiff", "images/exclude-*.webp"]

layouts/_partials/init/index.html

@@ -1,4 +1,4 @@
-{{- hugo.Store.Set "version" "v0.4.0-alpha.3-20251223100706-1039e328" -}}
+{{- hugo.Store.Set "version" "v0.4.0-alpha.3-20251224074056-4fec1cda" -}}
 {{- .Store.Set "this" dict -}}
 
 {{- partial "init/detection-env.html" . -}}