Update longitude return variable name

[GreenDjango]

Description

Fix return variable name in longitude function

Go Version

$ go version
go version go1.19.7 linux/amd64

Go Tests

$ go test
2023/04/13 00:05:55 Error while requesting https://loremflickr.com/300/200 : request failed
2023/04/13 00:05:56 Error while creating a temp file: temp file creation failed
2023/04/13 00:05:56 Error while requesting https://randomuser.me : request failed
2023/04/13 00:05:56 Error while creating a temp file: temp file creation failed
PASS
ok      github.com/jaswdr/faker 5.290s

[jaswdr]

Nice catch! Thank you for PR and congrats for your first contribution 🎉