Add missing translation keys for Roborock mop intensity (#94088)

homeassistant/components/roborock/strings.json

@@ -90,8 +90,11 @@
         "name": "Mop intensity",
         "state": {
           "off": "Off",
+          "low": "Low",
           "mild": "Mild",
+          "medium": "Medium",
           "moderate": "Moderate",
+          "high": "High",
           "intense": "Intense",
           "custom": "Custom"
         }