clarifying an instruction

Author: mw-hrastega

README.md

@@ -4,7 +4,7 @@ Use [GitHub® Actions Workflow Generator for MATLAB](https://matlab-actions.g
 
 To generate a starter workflow for your repository, in the workflow generation interface:
 
-1. Enter your repository URL or GitHub username and repository. 
+1. Enter your GitHub repository URL or username/repository. 
 2. (Optional) Under **Advanced Options**, select one or more options to customize the workflow. 
 3. Click **Generate Workflow**.