Update README.md

Author: brittjay0104

README.md

@@ -10,7 +10,7 @@ collection materials.
 Our artifact includes the following:
 
 1. A virtual machine file (CausalTesting_Artifact.ova) that contains
-the user study setup and version of Holmes used.
+the user study setup and source code for the version of Holmes used.
 
 2. The form participants completed as they worked through
 each defect in the user study (Cause-Identification-Form.pdf).
@@ -29,4 +29,4 @@ debriefing following the study (Evaluation-Questionnaire.pdf)
 All the above listed artifacts, with the exception of the virtual machine file, are located in this repository.
 
 
-The **INSTALL.md** file provides details on how to locate, set up, and run the virutal machine. 
+The **INSTALL.md** file provides details on how to locate, set up, and run the virutal machine.