style: move error color to M3 theme code

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

app/src/main/java/com/nextcloud/talk/contacts/ContactsActivityCompose.kt

@@ -133,7 +133,7 @@ fun ContactsList(contactsUiState: ContactsUiState, contactsViewModel: ContactsVi
         is ContactsUiState.Error -> {
             val errorMessage = contactsUiState.message
             Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
-                Text(text = "Error: $errorMessage", color = Color.Red)
+                Text(text = "Error: $errorMessage", color = MaterialTheme.colorScheme.error)
             }
         }
     }
@@ -230,7 +230,7 @@ fun ContactItemRow(contact: AutocompleteUser, contactsViewModel: ContactsViewMod
         is RoomUiState.Error -> {
             val errorMessage = (roomUiState as RoomUiState.Error).message
             Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
-                Text(text = "Error: $errorMessage", color = Color.Red)
+                Text(text = "Error: $errorMessage", color = MaterialTheme.colorScheme.error)
             }
         }
         is RoomUiState.None -> {}