chore: translation for create study subtitles

designer_v2/lib/localization/app_en.arb

@@ -93,9 +93,9 @@
   "action_button_new_study": "New trial",
   "action_button_create": "Create",
   "action_button_standalone_study_title": "Standalone Trial",
-  "action_button_standalone_study_subtitle": "Create a new fully customizable, independent trial.",
+  "action_button_standalone_study_subtitle": "Create a new fully customizable Standalone trial, which can be used for one person or also for a series of Standalone trials with the same specifications for everyone",
   "action_button_template_title": "Template Trial",
-  "action_button_template_subtitle": "Create a new Template Trial which consists of Subtrials.\nThe Template Trial can restrict the customization of the Subtrials.\nThe Subtrials are prefilled with the configuration of the Template Trial.\nThe Template Trial itself is not a study and cannot be run.",
+  "action_button_template_subtitle": "Create a new Template Trial, which is a template for a series of Standalone Trials where every participant can have a slightly different trial. For example, run a trial investigating different non-pharmacological interventions on sleep quality, where each person can choose their own intervention of interest and use one of three pre-defined measures of sleep quality.",
   "action_button_template_hint": "Hint: Use the three dots menu next to a Template Trial to create a Subtrial.",
   "search": "Search",
   "studies_list_header_title": "Title",