Bump minimum required WordPress version to 6.6 (#704)

Author: t-hamano

readme.txt

@@ -1,7 +1,7 @@
 === Create Block Theme ===
 Contributors: wordpressdotorg, mikachan, onemaggie, pbking, scruffian, mmaattiiaass, jffng, madhudollu, egregor, vcanales, jeffikus, cwhitmore
 Tags: themes, theme, block-theme
-Requires at least: 6.5
+Requires at least: 6.6
 Tested up to: 6.6
 Stable tag: 2.3.0
 Requires PHP: 7.4

src/plugin-sidebar.js

@@ -3,7 +3,7 @@
  */
 import { useState } from '@wordpress/element';
 import { registerPlugin } from '@wordpress/plugins';
-import { PluginSidebar, PluginSidebarMoreMenuItem } from '@wordpress/edit-site';
+import { PluginSidebar, PluginSidebarMoreMenuItem } from '@wordpress/editor';
 import { __, _x } from '@wordpress/i18n';
 import { useDispatch } from '@wordpress/data';
 import { store as noticesStore } from '@wordpress/notices';