fix(airam_s1wfaa_siren): fix volume scaling

Volume level in HA is floating point in range 0.0 - 1.0
Previous implementation of this config used 0-100

custom_components/tuya_local/devices/airam_s1wfaa_siren.yaml

@@ -23,13 +23,13 @@ entities:
         name: volume_level
         mapping:
           - dps_val: mute
-            value: 0
+            value: 0.0
           - dps_val: low
-            value: 33
+            value: 0.33
           - dps_val: middle
-            value: 66
+            value: 0.66
           - dps_val: high
-            value: 100
+            value: 1.0
       - id: 7
         type: integer
         name: duration