SG Ergodox layout: Add ENTER to left keyboard

- Swiss German Ergodox layout:
    Added ENTER key to left keyboard half on media layer
    such that the enter key is available on both halves to
    be able to flash both halves without an additional keyboard.

keyboards/ergodox/keymaps/swissgerman/keymap.c

@@ -125,7 +125,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
        KC_DOWN, KC_4,   KC_5,    KC_6,    ACTION_MODS_KEY(MOD_RSFT,KC_1), KC_TRNS,
        KC_TRNS, ACTION_MODS_KEY(MOD_RSFT,KC_6), KC_1,   KC_2,    KC_3,  ACTION_MODS_KEY(MOD_RALT,KC_NONUS_BSLASH), KC_TRNS,
        ACTION_MODS_KEY(MOD_RSFT,KC_MINS),KC_DOT,  KC_0,   KC_EQL, KC_TRNS,
-       KC_TRNS, KC_TRNS,
+       KC_ENT, KC_TRNS,
        KC_TRNS,
        KC_TRNS, KC_TRNS, KC_TRNS
 ),
@@ -145,7 +145,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
  *                                        ,-------------.       ,-------------.
  *                                        |      |      |       |      |      |
  *                                 ,------|------|------|       |------+------+------.
- *                                 |      |      |      |       |      |      |Brwser|
+ *                                 |Enter |      |      |       |      |      |Brwser|
  *                                 |      |      |------|       |------|      |Back  |
  *                                 |      |      |      |       |      |      |      |
  *                                 `--------------------'       `--------------------'