[docs] add note about initially selected value

Closes #7430

site/content/tutorial/06-bindings/06-select-bindings/text.md

@@ -10,4 +10,4 @@ We can also use `bind:value` with `<select>` elements. Update line 20:
 
 Note that the `<option>` values are objects rather than strings. Svelte doesn't mind.
 
-> Because we haven't set an initial value of `selected`, the binding will set it to the default value (the first in the list) automatically. Be careful though — until the binding is initialised, `selected` remains undefined, so we can't blindly reference e.g. `selected.id` in the template.
+> Because we haven't set an initial value of `selected`, the binding will set it to the default value (the first in the list) automatically. Be careful though — until the binding is initialised, `selected` remains undefined, so we can't blindly reference e.g. `selected.id` in the template. If your use case allows it, you could also set an initial value to bypass this problem.