[ns] rotate api token

as a standard security precaution, rotate the api key every so often for the boost cli tool that maintainers use to add/remove/list channels.

-- maintainers: this will require running the following to update your api token:

cd path/to/signalboost
git pull origin master
./bin/blackbox/shred_all_files
./bin/blackbox/decryp_all_files