Change webcam file name so that it fits on one line in Dashboard (#1660)

packages/@uppy/webcam/src/index.js

@@ -267,7 +267,7 @@ module.exports = class Webcam extends Plugin {
       return Promise.reject(new Error('No video element found, likely due to the Webcam tab being closed.'))
     }
 
-    const name = `webcam-${Date.now()}.jpg`
+    const name = `cam-${Date.now()}.jpg`
     const mimeType = 'image/jpeg'
 
     const width = video.videoWidth