Revert "Update version and description in metadata.json"

This reverts commit d8d0281.

Author: thyttan

apps/sleeplog/metadata.json

@@ -2,8 +2,8 @@
   "id":"sleeplog",
   "name":"Sleep Log",
   "shortName": "SleepLog",
-  "version": "0.21",
-  "description": "Log and view your sleeping habits. This app uses built in movement calculations, or HRM data is present. View data from Bangle, or from the web app.",
+  "version": "0.20",
+  "description": "Log and view your sleeping habits. This app uses built in movement calculations. View data from Bangle, or from the web app.",
   "icon": "app.png",
   "type": "app",
   "tags": "tool,boot,health",