fixed bottom custom image order

src/core/draw/participant/custom.typ

@@ -6,13 +6,16 @@
 
 #let render(x, y, p, bottom) = {
   let style = p.resolved-style
+  let elmts = (style.image, p.display-name)
+  if bottom {
+    elmts = elmts.rev()
+  }
   let shape = align(
     center,
     stack(
       dir: ttb,
       spacing: normalize-units(style.spacing) * 1pt,
-      style.image,
-      p.display-name
+      ..elmts
     )
   )
   let anchor = if bottom {"north"} else {"base"}