fix: change the wording in the mattermost markdown info box

Author: hanneskt

ui/src/components/announcements/AnnouncementForm.tsx

@@ -106,8 +106,9 @@ export function AnnouncementForm({ announcement, defaultEvents, onSubmit }: Prop
         </PageHeader>
         <div className="border border-orange-500 rounded-lg whitespace-pre p-8">
           {`Mattermost supports only a small subset of markdown features.\nThe preview you see does not necessarily reflect what mattermost will render.\nYou can find `}
+          {`a list of supported features `}
           <a href="https://mattermost.com/blog/laymans-guide-to-markdown-on-mattermost/" target="_blank" rel="noopener noreferrer" className="cursor-pointer underline underline-offset-4 decoration-orange-500 hover:no-underline">here</a>
-          {` a list of supported features.`}
+          {`.`}
         </div>
         <form className="space-y-4" onSubmit={(e) => {
           e.preventDefault();