walkthrough: fix references to git-namespace
walkthrough: fix references to git-namespace

matthiasn/lambdacd,tobiasbayer/lambdacd,matthiasn/lambdacd,tobiasbayer/lambdacd,cz8s/lambdacd,cz8s/lambdacd,flosell/lambdacd,flosell/lambdacd,tobiasbayer/lambdacd,flosell/lambdacd,cz8s/lambdacd,matthiasn/lambdacd