Updated to correct vendor

Author: thussaiththelaw

components/i2c/aht21/definition.json

@@ -1,7 +1,7 @@
 {
-    "vendor": "Hiletgo",
+    "vendor": "ASAIR",
     "documentationURL": "http://www.aosong.com/en/products-60.html",
     "displayName": "aht21",
     "i2cAddresses": [ "0x38"],
     "subcomponents": [ "ambient-temp", "ambient-temp-fahrenheit", "humidity"]
-}
+}