include saving SearchPrecisionScore because it is not public before

Author: taooceros

Flow.Launcher.Infrastructure/UserSettings/Settings.cs

@@ -39,7 +39,8 @@ public string Language
         /// </summary>
         public bool ShouldUsePinyin { get; set; } = false;
 
-        internal SearchPrecisionScore QuerySearchPrecision { get; private set; } = SearchPrecisionScore.Regular;
+        [JsonInclude, JsonConverter(typeof(JsonStringEnumConverter))]
+        public SearchPrecisionScore QuerySearchPrecision { get; private set; } = SearchPrecisionScore.Regular;
 
         [JsonIgnore]
         public string QuerySearchPrecisionString