layouts: Fill some placeholders with '²' and '³'

Part-of: <https://gitlab.gnome.org/World/Phosh/squeekboard/-/merge_requests/703>

data/keyboards/hu_wide.yaml

@@ -22,13 +22,13 @@ views:
         - "show_upper Í Y X C V B N M BackSpace"
         - "show_numbers show_eschars preferences space ? : ! Return"
     numbers:
-        - "-- 1 2 3 4 5 6 7 8 9 0 --"
-        - "-- @ # € % & - _ + ( ) --"
+        - "-- 1 2 3 4 5 6 7 8 9 0 ²"
+        - "-- @ # € % & - _ + ( ) ³"
         - "show_symbols ; \" ' : = < > -- BackSpace"
         - "show_letters show_eschars preferences space , . - Return"
     symbols:
-        - "-- ~ ` ´ | · √ µ ÷ × ¶ --"
-        - "-- © ® £ $ ¥ ^ ° * { } --"
+        - "-- ~ ` ´ | · √ µ ÷ × ¶ ²"
+        - "-- © ® £ $ ¥ ^ ° * { } ³"
         - "show_numbers \\ / § π τ [ ] -- BackSpace"
         - "show_letters show_eschars preferences space , . - Return"
     eschars: