🌐 improve translation for vacuum (#2212)

Author: al-one

custom_components/xiaomi_miot/translations/en.json

@@ -206,6 +206,8 @@
             "info": {"name": "Info"}
         },
         "sensor": {
+            "clean_area": {"name": "Clean Area"},
+            "clean_time": {"name": "Clean Time"},
             "power_cost_today": {"name": "Energy Today"},
             "power_cost_month": {"name": "Energy Month"},
             "power_cost_today_2": {"name": "Energy Today"},

custom_components/xiaomi_miot/translations/zh-Hans.json

@@ -142,6 +142,8 @@
             "info": {"name": "信息"}
         },
         "sensor": {
+            "clean_area": {"name": "清洁面积"},
+            "clean_time": {"name": "清洁时间"},
             "power_cost_today": {"name": "日电量"},
             "power_cost_month": {"name": "月电量"},
             "power_cost_today_2": {"name": "日电量"},