fix: properly translate static table headers (#904)

packages/core/src/locales/en/index.ts

@@ -1,6 +1,6 @@
-import type { LocalePhrasesRoot } from '@staticcms/core/interface';
+import type { BaseLocalePhrasesRoot } from '../types';
 
-const en: LocalePhrasesRoot = {
+const en: BaseLocalePhrasesRoot = {
   auth: {
     login: 'Login',
     loggingIn: 'Logging in...',
@@ -65,6 +65,10 @@ const en: LocalePhrasesRoot = {
       other: 'Other',
       negateLabel: 'Not %{label}',
     },
+    table: {
+      summary: 'Summary',
+      collection: 'Collection',
+    },
     defaultFields: {
       author: {
         label: 'Author',