Update copyright name

We should probably change the torbrowser-launcher copyright that gets printed on stdout when the launcher is started to Tor Project or something similar:

$ grep "By Micah Lee" * -R
...
torbrowser_launcher/__init__.py:    print(_("By Micah Lee, licensed under MIT"))
torbrowser_launcher.pot:msgid "By Micah Lee, licensed under MIT"

/cc @boklm