Add virtual workspaces to extension guide overview table

api/extension-guides/overview.md

@@ -35,6 +35,7 @@ Here are the guides on the VS Code website, including their usage of the [VS Cod
 | [Webview](https://code.visualstudio.com/api/extension-guides/webview) | [window.createWebviewPanel](https://code.visualstudio.com/api/references/vscode-api#window.createWebviewPanel)<br>[window.registerWebviewPanelSerializer](https://code.visualstudio.com/api/references/vscode-api#window.registerWebviewPanelSerializer) |
 | [Custom Editors](https://code.visualstudio.com/api/extension-guides/custom-editors) | [window.registerCustomEditorProvider](https://code.visualstudio.com/api/references/vscode-api#window.registerCustomEditorProvider)<br>[CustomTextEditorProvider](https://code.visualstudio.com/api/references/vscode-api#CustomTextEditorProvider)<br>[contributes.customEditors](https://code.visualstudio.com/api/references/contribution-points#contributes.customEditors) |
 | [Virtual Documents](https://code.visualstudio.com/api/extension-guides/virtual-documents) | [workspace.registerTextDocumentContentProvider](https://code.visualstudio.com/api/references/vscode-api#workspace.registerTextDocumentContentProvider)<br>[commands.registerCommand](https://code.visualstudio.com/api/references/vscode-api#commands.registerCommand)<br>[window.showInputBox](https://code.visualstudio.com/api/references/vscode-api#window.showInputBox) |
+| [Virtual Workspaces](https://code.visualstudio.com/api/extension-guides/virtual-workspaces) | [workspace.fs](https://code.visualstudio.com/api/references/vscode-api#workspace.fs)<br>capabilities.virtualWorkspaces |
 | [Workspace Trust](https://code.visualstudio.com/api/extension-guides/workspace-trust) | [workspace.isTrusted](https://code.visualstudio.com/api/references/vscode-api#workspace.isTrusted)<br>[workspace.onDidGrantWorkspaceTrust](https://code.visualstudio.com/api/references/vscode-api#workspace.onDidGrantWorkspaceTrust)<br>capabilities.untrustedWorkspaces |
 | [Task Provider](https://code.visualstudio.com/api/extension-guides/task-provider) | [tasks.registerTaskProvider](https://code.visualstudio.com/api/references/vscode-api#tasks.registerTaskProvider)<br>[Task](https://code.visualstudio.com/api/references/vscode-api#Task)<br>[ShellExecution](https://code.visualstudio.com/api/references/vscode-api#ShellExecution)<br>[contributes.taskDefinitions](https://code.visualstudio.com/api/references/contribution-points#contributes.taskDefinitions) |
 | [Source Control](https://code.visualstudio.com/api/extension-guides/scm-provider) | [workspace.workspaceFolders](https://code.visualstudio.com/api/references/vscode-api#workspace.workspaceFolders)<br>[SourceControl](https://code.visualstudio.com/api/references/vscode-api#SourceControl)<br>[SourceControlResourceGroup](https://code.visualstudio.com/api/references/vscode-api#SourceControlResourceGroup)<br>[scm.createSourceControl](https://code.visualstudio.com/api/references/vscode-api#scm.createSourceControl)<br>[TextDocumentContentProvider](https://code.visualstudio.com/api/references/vscode-api#TextDocumentContentProvider)<br>[contributes.menus](https://code.visualstudio.com/api/references/contribution-points#contributes.menus) |