fix @(optimization_mode) usage in builtin collections

core/image/bmp/bmp.odin

@@ -122,7 +122,7 @@ load_from_bytes :: proc(data: []byte, options := Options{}, allocator := context
 	return img, err
 }
 
-@(optimization_mode="speed")
+@(optimization_mode="favor_size")
 load_from_context :: proc(ctx: ^$C, options := Options{}, allocator := context.allocator) -> (img: ^Image, err: Error) {
 	context.allocator = allocator
 	options := options
@@ -743,4 +743,4 @@ destroy :: proc(img: ^Image) {
 @(init, private)
 _register :: proc() {
 	image.register(.BMP, load_from_bytes, destroy)
-}
+}