migrate ublue-os RPM spec files license from MIT to APACHE 2.0

[bsherman]

I noticed that all the spec files in this repo have a license of MIT. However, in general, Universal Blue uses the APACHE 2.0 license.

If the spec file is packaging our own source code, I believe we should match our repo license.

Exception: for any spec files we maintain for 3rd party source, the license should reflect the respective source license.