chore: remove alpha for release (#9351)

Author: snowystinger

packages/dev/s2-docs/pages/s2/SelectBoxGroup.mdx

@@ -5,7 +5,6 @@ export default Layout;
 import docs from 'docs:@react-spectrum/s2';
 
 export const tags = ['box'];
-export const version = 'alpha';
 export const description = 'Allows users to select one or more options from a list.';
 
 # SelectBoxGroup

packages/dev/s2-docs/pages/s2/Toast.mdx

@@ -7,7 +7,6 @@ import {InterfaceType} from '../../src/types';
 import {VersionBadge} from '../../src/VersionBadge';
 
 export const tags = ['snackbar', 'notification', 'alert'];
-export const version = 'alpha';
 export const description = 'Displays a temporary notification of an action, error, or other event.';
 
 # Toast