add max chars limit to feedback text

nym-connect/desktop/src/pages/connection/Disconnected.tsx

@@ -51,7 +51,8 @@ export const Disconnected: FCWithChildren<{
 
             {showFeedbackNote ? (
               <Alert variant="outlined" icon={false} onClose={() => setShowFeedbackNote(false)}>
-                Help improve NymConnect{' '}
+                Help improve NymConnect
+                <br />
                 <Link to="/menu/reporting/user-feedback" component={RouterLink} color="secondary" underline="hover">
                   Send feedback
                 </Link>

nym-connect/desktop/src/pages/menu/reporting/UserFeedback.tsx

@@ -14,7 +14,7 @@ type FormValues = {
 
 const schema = object({
   email: string().email(),
-  feedback: string().required().min(20),
+  feedback: string().required().min(20).max(512),
 }).required();
 
 export const UserFeedback = () => {