fix date check

update_checker.py

@@ -122,5 +122,5 @@ for download in allFirmwareDownloads:
         #pprint.pprint(request.json())
         # raw.json only contains data from 14 days - do not print message if we encounter older log entries
         download_ts = datetime.datetime.strptime(r.date, "%d/%b/%Y:%H:%M:%S %z]")
-        if download_ts - datetime.datetime.now(tz=datetime.timezone.utc) > datetime.timedelta(days=14):
+        if (datetime.datetime.now(tz=datetime.timezone.utc) - download_ts) < datetime.timedelta(days=14):
             print("%s %s with agent %s seems not to be a node @ %s"%(r.ipv6,mac,r.agent,r.date))