Update website/docs/chapter-02/03_executing.md

Co-authored-by: Aleksi Simell <[email protected]>

Author: Snooz82

website/docs/chapter-02/03_executing.md

@@ -86,7 +86,7 @@ Explain the execution artifacts generated by Robot Framework.
 
 ::::
 
-After executing a suite, Robot Framework, by default, generates tree output files in the output directory. These artifacts provide detailed execution results:
+After executing a suite, Robot Framework, by default, generates three output files in the output directory. These artifacts provide detailed execution results:
 
 - **`output.xml`**: A machine-readable file containing **ALL** logged execution details, limited by the given log-level.
 - **`log.html`**: A detailed log file that provides an HTML view of the execution, including keyword-level details.