fix(i18n): update translations (#4333)

Author: boxmoji

i18n/ja-JP.properties

@@ -1211,7 +1211,7 @@ boxui.itemDetails.enterpriseOwner = 企業の所有者
 # Warning message in the sidebar that this file will be automatically deleted on a certain date, {expiration} is the date
 boxui.itemDetails.fileExpiration = このファイルは{expiration}に削除されます。
 # Label for files count under item properties in the sidebar
-boxui.itemDetails.filesCountLabel = {filesCount, plural, one {# File} other {# Files}}
+boxui.itemDetails.filesCountLabel = {filesCount, plural, one {#ファイル} other {#ファイル}}
 # Warning message in the sidebar that this folder will be automatically deleted on a certain date, {expiration} is the date
 boxui.itemDetails.folderExpiration = このフォルダは{expiration}に削除されます。
 # Label for modified date under item properties in the sidebar