net: lib: nrf_cloud: Change lng to lon

Conform with the latest schema for PVT reports.

Jira: IRIS-5572

Signed-off-by: Pete Skeggs <[email protected]>

Author: plskeggs

include/net/nrf_cloud_defs.h

@@ -137,7 +137,7 @@
 
 /* GNSS - PVT */
 #define NRF_CLOUD_JSON_GNSS_PVT_KEY_LAT		"lat"
-#define NRF_CLOUD_JSON_GNSS_PVT_KEY_LON		"lng"
+#define NRF_CLOUD_JSON_GNSS_PVT_KEY_LON		"lon"
 #define NRF_CLOUD_JSON_GNSS_PVT_KEY_ACCURACY	"acc"
 #define NRF_CLOUD_JSON_GNSS_PVT_KEY_ALTITUDE	"alt"
 #define NRF_CLOUD_JSON_GNSS_PVT_KEY_SPEED	"spd"