Radarr sensor fix for issue #8250 (#8456)

* Radarr sensor fix for issue #8250

* Radarr sensor fix for issue #8250

homeassistant/components/sensor/radarr.py

@@ -216,9 +216,9 @@ def get_date(zone, offset=0):
 
 def get_release_date(data):
     """Get release date."""
-    date = data['physicalRelease']
+    date = data.get('physicalRelease')
     if not date:
-        date = data['inCinemas']
+        date = data.get('inCinemas')
     return date