Add @public release tag to Spinner component (#34576) (#34578)

(cherry picked from commit b5de6e7a1d)

Co-authored-by: Ivana Huckova <30407135+ivanahuckova@users.noreply.github.com>

packages/grafana-ui/src/components/Spinner/Spinner.tsx

@@ -23,6 +23,10 @@ export type Props = {
   inline?: boolean;
   size?: number;
 };
+
+/**
+ * @public
+ */
 export const Spinner: FC<Props> = (props: Props) => {
   const { className, inline = false, iconClassName, style, size = 16 } = props;
   const styles = getStyles(size, inline);