docs(CONTRIBUTING.md): fix broken link to angular commit conventions
docs(CONTRIBUTING.md): fix broken link to angular commit conventions
wesleifreitas/angular-input-masks,pavelpykhtin/angular-input-masks,assisrafael/angular-input-masks,wesleifreitas/angular-input-masks,neokyox/angular-input-masks,smilight/angular-input-masks,smilight/angular-input-masks,pavelpykhtin/angular-input-masks,neokyox/angular-input-masks,assisrafael/angular-input-masks