settings: Prefer use .into() instead of .to_string()
settings: Prefer use .into() instead of .to_string()

The .into() is smaller and allows for the type to be changed in future
without impose changes in the code doing the conversion.

Signed-off-by: Otavio Salvador <1d31b11c1b92bf5d043d36edfe7174db39a6b891@ossystems.com.br>

UpdateHub/updatehub