fix name

[Deleted user]

here:

https://github.com/eikenb/terminal-colors#help-output

it shows

Usage: colortest-python [options]

but the command is actually:

/usr/bin/terminal-colors

[eikenb]

Hey @cup, thanks for pointing that out. I must have grabbed that output after running it using the Debian package where it's named colortest-python (the packager requested it to have it go with the existing colortest package).

I'll be uploading a fixed version in a couple. Thanks again.