Update _config.yml

Author: lstegner

_config.yml

@@ -1,5 +1,5 @@
 title: Laura Stegner
-logo: /assets/img/stegner-headshot-circle.png
+logo: /assets/img/headshot.jpg
 bottom_img: /assets/img/favicon.ico
 description: PhD candidate studying HRI
 show_downloads: false
@@ -23,4 +23,4 @@ author:
   youtube          :
   twitter          : "lmstegner"
 
-github: [metadata]
+github: [metadata]