Update cotxpetfon.yaml (#514)

rename the cotxpetfon to "COTX Petfon"， but not change the file name

vendor/cotx/cotxpetfon.yaml

@@ -1,4 +1,4 @@
-name: cotxpetfon
+name: COTX Petfon
 description: With the LoRaWAN protocol, you can track anything you want, such as pets, children, cars, etc.
 
 # Hardware versions (optional, use when you have revisions)