Fix Translation Argument

resource/locales/en-US/translation.json

@@ -739,7 +739,7 @@
   },
 
   "full_text_search_management":{
-    "index_build":"Elasticsearch Management",
+    "elasticsearch_management":"Elasticsearch Management",
     "build_button":"Rebuild Index",
     "rebuild_description_1":"Force rebuild index.",
     "rebuild_description_2":"Click 'Build Now' to delete and create mapping file and add all pages.",

resource/locales/ja/translation.json

@@ -724,7 +724,7 @@
   },
 
   "full_text_search_management":{
-    "index_build":"Elasticsearch 管理",
+    "elasticsearch_management":"Elasticsearch 管理",
     "build_button":"インデックスのリビルド",
     "rebuild_description_1":"Build Now ボタンを押すと全てのページのインデックスを削除し、作り直します。",
     "rebuild_description_2":"この作業には数秒かかります。",

src/client/js/components/Admin/FullTextSearchManagement/FullTextSearchPage.jsx

@@ -41,7 +41,7 @@ class FullTextSearchManagement extends React.Component {
     return (
       <Fragment>
         <fieldset className="pr-3">
-          <legend> { t('full_text_search_management.index_build') } </legend>
+          <legend> { t('full_text_search_management.elasticsearch_management') } </legend>
           <div className="form-group form-horizontal">
             <div className="col-xs-3 control-label"></div>
             <div className="col-xs-7">