Add name of output file

Author: DocVi

README.md

@@ -17,7 +17,7 @@ To download this example project to your computer, you can either:
     3. `conda install -c conda-forge ezc3d` (c3d parsing library, see https://github.com/pyomeca/ezc3d)
     4. `conda install -c anaconda lxml` (xml parsing library)
 4. Open QTM and make sure that the path to `Command Prompt` is set in Project Options/Miscellaneous/Folder Options (the path is usually C:\Windows\System32\cmd.exe)   
-5. Click on `Start Processing` to automatically export c3d files, read the c3d files content and export some data into an xml file. 
+5. Click on `Start Processing` to automatically export c3d files, read the c3d files content and export some data into `output.xml` file. 
 
 ## Resources for using the Qualisys Project Automation Framework (PAF)