[ld2450] fix syntax error (#5195)

Author: RubenKelevra

components/sensor/ld2450.rst

@@ -475,7 +475,7 @@ Here is the complete example configuration for :doc:`ld2450`.
         bluetooth:
           name: "Bluetooth"
         multi_target:
-          name: Multi Target Tracking"
+          name: "Multi Target Tracking"
 
     select:
       - platform: ld2450