chore(strings): update 2.4 user-facing strings (#1155)

(cherry picked from commit 6fcf52a)

locales/en/public.json

@@ -258,9 +258,9 @@
     "DESCRIPTION": "Select Dashboard Layout Template configuration file(s) to upload. File(s) must be in valid JSON format.",
     "ERROR": {
       "CONFIG_INVALID": "Card configurations are invalid.",
-      "DESCRIPTION_INVALID": "Template description is invalid.",
+      "DESCRIPTION_INVALID": "Template description is invalid. The description can only include letters, numbers, spaces, quotations, punctuations, and some other special characters such as underscores and brackets. It must also be 100 characters or less.",
       "DUPLICATE_UPLOAD": "A previously uploaded file has the same template name as the current file: \"{{name}}\".",
-      "NAME_INVALID": "Template name is invalid.",
+      "NAME_INVALID": "Template name is invalid. The name must be alphanumeric and be 20 characters or less.",
       "NAME_TAKEN": "Template with name \"{{name}}\" already exists.",
       "PARSE": "JSON parse error.",
       "TEMPLATE_INVALID": "Template has an invalid configuration.",