Update extensions/ql-vscode/test/vscode-tests/cli-integration/debug-controller.ts

Co-authored-by: Koen Vlaswinkel <koesie10@users.noreply.github.com>

Author: Dave Bartolomeo

extensions/ql-vscode/test/vscode-tests/cli-integration/debug-controller.ts

@@ -211,7 +211,7 @@ export class DebugController
 
   public async createLaunchJson(config: QLDebugConfiguration): Promise<void> {
     const launchJsonPath = join(
-      workspace.workspaceFolders![0].uri.fsPath,
+     getOnDiskWorkspaceFolders()[0],
       ".vscode/launch.json",
     );