webcam: Fix 'picture' mode typo.

packages/@uppy/webcam/types/index.d.ts

@@ -1,11 +1,13 @@
 import { Plugin, PluginOptions, Uppy } from '@uppy/core';
 
+export type WebcamMode = 'video-audio' | 'video-only' | 'audio-only' | 'picture';
+
 export interface WebcamOptions extends PluginOptions {
   onBeforeSnapshot?: () => Promise<void>;
   countdown?: number | boolean;
   mirror?: boolean;
   facingMode?: string;
-  modes: Array<'video-audio' | 'video-only' | 'audio-only' | 'picturee'>;
+  modes: WebcamMode[];
 }
 
 export default class Webcam extends Plugin {