More target-typed new and redundant paranthesis cleanup

src/NadekoBot/Services/strings/impl/BotStrings.cs

@@ -72,7 +72,7 @@ public class BotStrings : IBotStrings
                 Log.Warning("'{CommandName}' doesn't exist in 'en-US' command strings. Please report this",
                     commandName);
                     
-                return new CommandStrings()
+                return new()
                 {
                     Args = new[] {""},
                     Desc = "?"

src/NadekoBot/Services/strings/impl/RedisBotStringsProvider.cs

@@ -43,7 +43,7 @@ public class RedisBotStringsProvider : IBotStringsProvider
             return null;
             
         var args = Array.ConvertAll(argsStr.Split('&'), HttpUtility.UrlDecode);
-        return new CommandStrings()
+        return new()
         {
             Args = args,
             Desc = descStr