change label in admin.json for #17

resource/locales/en-US/admin/admin.json

@@ -107,7 +107,7 @@
     "behavior_desc": {
       "growi_text1": "Both of <code>/page</code> and <code>/page/</code> shows the same page",
       "growi_text2": "<code>/nonexistent_page</code> shows editing form",
-      "growi_text3": "All pages shows the list of sub pages <b>if using GROWI Enhanced Layout</b>",
+      "growi_text3": "All pages show the list of sub pages <b>if using GROWI Enhanced Layout</b>",
       "crowi_text1": "<code>/page</code> shows the page",
       "crowi_text2": "<code>/page/</code> shows the list of sub pages",
       "crowi_text3": "If portal is applied to <code>/page/</code> , the portal and the list of sub pages are shown",