Added japanese translation for new environments

Author: danielmain

source/renderer/app/i18n/locales/ja-JP.json

@@ -157,8 +157,8 @@
   "environment.network.alonzo_purple": "Alonzo Purple",
   "environment.network.development": "開発",
   "environment.network.mainnet": "メインネット",
-  "environment.network.preprod": "Pre-Prod",
-  "environment.network.preview": "Preview",
+  "environment.network.preprod": "プリプロ",
+  "environment.network.preview": "プレビュー",
   "environment.network.selfnode": "Selfnode",
   "environment.network.shelley_qa": "Shelley QA",
   "environment.network.staging": "ステージング",
@@ -682,8 +682,8 @@
   "test.environment.daedalusFlightLabel": "Cardano Mainnet - Daedalus Flight",
   "test.environment.developmentLabel": "開発",
   "test.environment.mainnetLabel": "メインネット",
-  "test.environment.preprodLabel": "Pre-Prod",
-  "test.environment.previewLabel": "Preview",
+  "test.environment.preprodLabel": "プリプロ",
+  "test.environment.previewLabel": "プレビュー",
   "test.environment.selfnodeLabel": "Selfnode",
   "test.environment.shelleyQaLabel": "Shelley QA",
   "test.environment.stagingLabel": "ステージング",
@@ -1327,4 +1327,4 @@
   "wallet.transferFunds.dialog2.total.label": "合計",
   "widgets.itemsDropdown.syncingLabel": "同期",
   "widgets.itemsDropdown.syncingLabelProgress": "同期中 {syncingProgress}%"
-}
+}