chore: Translate transifex_input.json in it_IT

96% of minimum 50% translated source file: 'transifex_input.json'
on 'it_IT'.

Sync of partially translated files: 
untranslated content is included with an empty translation 
or source language content depending on file format

translations/frontend-app-course-authoring/src/i18n/messages/it_IT.json

@@ -28,6 +28,7 @@
   "course-authoring.content-tags-drawer.spinner.loading": "Caricamento",
   "course-authoring.content-tags-drawer.tags-dropdown-selector.spinner.loading": "Caricamento tag",
   "course-authoring.content-tags-drawer.tags-dropdown-selector.load-more-tags.button": "Caricane di più",
+  "course-authoring.content-tags-drawer.tags-dropdown-selector.no-tags-found": "No tags found with the search term \"{searchTerm}\"",
   "course-authoring.content-tags-drawer.tags-dropdown-selector.selectable-box.aria.label": "casella di controllo {tag}",
   "course-authoring.content-tags-drawer.content-tags-collapsible.selectable-box.selection.aria.label": "selezione dei tag della tassonomia",
   "course-authoring.course-outline.headingTitle": "contorno corso",