HFP-3232 Change search placeholder text for content hub filters

language/en.js

@@ -236,7 +236,7 @@ H5PEditor.language.core = {
       dropdownLabel: 'Language',
       dialogHeader: 'Select language(s)',
       dialogButtonLabel: 'Filter languages',
-      searchPlaceholder: 'Select one or more languages'
+      searchPlaceholder: 'Type to search for languages'
     },
     reviewed: {
       dropdownLabel: 'Reviewed',
@@ -248,13 +248,13 @@ H5PEditor.language.core = {
       dropdownLabel: 'Content types',
       dialogHeader: 'Select Content type(s)',
       dialogButtonLabel: 'Filter Content Types',
-      searchPlaceholder: 'Select one or more content types'
+      searchPlaceholder: 'Type to search for content types'
     },
     disciplines: {
       dropdownLabel: 'Discipline',
       dialogHeader: 'Select Your Discipline',
       dialogButtonLabel: 'Filter Disciplines',
-      searchPlaceholder: 'Select one or more disciplines'
+      searchPlaceholder: 'Type to search for disciplines'
     },
     licenses: {
       dropdownLabel: 'License',