Fix docs favicon path

The logo.png file lives in the static folder now, not the docs/assets folder.

package.json

@@ -80,7 +80,7 @@
     "title": "LAMP Platform",
     "tagline": "The LAMP Platform documentation.",
     "url": "https://docs.lamp.digital",
-    "favicon": "./docs/assets/logo.png",
+    "favicon": "./static/logo.png",
     "organizationName": "BIDMCDigitalPsychiatry",
     "projectName": "LAMP-platform",
     "baseUrl": "/",