update link to collateral spec
authors = ['Interlay']
description = 'Collateral module'
edition = '2018'
-homepage = 'https://interlay.gitlab.io/polkabtc-spec/spec/treasury.html'
+homepage = 'https://interlay.gitlab.io/polkabtc-spec/spec/collateral.html'
name = 'collateral'
version = '0.1.0'
