fix: Don't filter out falsey input values when generating ARIA labels. (#9439)

core/field_input.ts

@@ -191,7 +191,7 @@ export abstract class FieldInput<T extends InputTypes> extends Field<
 
     const element = this.getFocusableElement();
     const label = [this.getValue(), this.getAriaName()]
-      .filter((item) => !!item)
+      .filter((item) => item !== null)
       .join(', ');
 
     aria.setState(element, aria.State.LABEL, label);