Changed some of the expected input file names to stay closer to the day titles

tests/UTrebuchetTestCases.pas

@@ -95,7 +95,7 @@ end;
 
 function TExample2Trebuchet.GetDataFileName: string;
 begin
-  Result := 'trebuchet_calibration_document2.txt';
+  Result := 'trebuchet2.txt';
 end;
 
 { TTrebuchetExample2TestCase }