[Library Manager] Update library names

[flybrianfly]

I'd like to update the names for the following three libraries to be consistent with my BME280 library, which had a naming conflict. I've updated the name in the library.properties file and the version and tag for each. Thanks!
https://github.com/bolderflight/MPU9250
https://github.com/bolderflight/AMS5812
https://github.com/bolderflight/AMS5915

[cmaglie]

Done!