Update to new command for F8 (fixes #52186)

src/vs/workbench/parts/welcome/walkThrough/electron-browser/editor/vs_code_editor_walkthrough.md

@@ -137,7 +137,7 @@ In a large file it can often be useful to collapse sections of code to increase
 >**Tip:** Folding is based on indentation and as a result can apply to all languages.  Simply indent your code to create a foldable section you can fold a certain number of levels with shortcuts like kb(editor.foldLevel1) through to kb(editor.foldLevel5).
 
 ### Errors and Warnings
-Errors and warnings are highlighted as you edit your code with squiggles.  In the sample below you can see a number of syntax errors.  By pressing kb(editor.action.marker.next) you can navigate across them in sequence and see the detailed error message.  As you correct them the squiggles and scrollbar indicators will update.
+Errors and warnings are highlighted as you edit your code with squiggles.  In the sample below you can see a number of syntax errors.  By pressing kb(editor.action.marker.nextInFiles) you can navigate across them in sequence and see the detailed error message.  As you correct them the squiggles and scrollbar indicators will update.
 
 ```js
 // This code has a few syntax errors