Incorrect message in publish_topic in exterior_service.proto

In exterior_service.proto, the publish topic is defined as:
`
option (uprotocol.publish_topic) = {
id : 0x8001,
name : "exterior_environment",
message : "SolarInformation"
};
`
This should be updated to:
`
option (uprotocol.publish_topic) = {
id : 0x8001,
name : "exterior_environment",
message : "Temperature"
};
`

Open exterior_service.proto and inspect the publish_topic option for exterior_environment with id 0x8001. Update its message value from SolarInformation to Temperature, then verify that the option contains the requested name and message.

Written by the indexing model from the issue text.