Update README.md

Co-authored-by: James Fletcher <42464962+jf205@users.noreply.github.com>

Author: SiaraMist

README.md

@@ -18,7 +18,7 @@ Once you've finished the code tour, your CodeQL environment will be all set up a
 
 You can use this codespace to learn about the concepts of CodeQL, without having to analyze any code.
 
-1. Create your own `.ql` file, or use an existing `.ql` file to write a CodeQL query.
+1. Edit the `tutorial.ql` file to write a CodeQL query.
 1. Once you've written your query, right-click within the `.ql` query file, and click **CodeQL: Run Query**, or
 1. Open the Command Palette with `Cmd/Ctrl + Shift + P`, start typing "CodeQL", and click on **CodeQL: Run Query**.