fix secondToEndSearch error

Author: taooceros

Flow.Launcher.Plugin/Query.cs

@@ -81,7 +81,7 @@ public Query(string rawQuery, string search, string[] terms, string[] searchTerm
         /// <summary>
         /// strings from second search (including) to last search
         /// </summary>
-        public string SecondToEndSearch => _secondToEndSearch ??= string.Join(' ', SearchTerms[1..]);
+        public string SecondToEndSearch => SearchTerms.Length > 1? _secondToEndSearch ??= string.Join(' ', SearchTerms[1..]]) : "";
 
         /// <summary>
         /// Return second search split by space if it has