Fix variable shadowing in blog-starter example (#13988)
Fix variable shadowing in blog-starter example (#13988)

Sorry for the super trivial PR. I noticed this while working with the example and figured it might be worth fixing. 
zeit/next.js,flybayer/next.js,zeit/next.js,flybayer/next.js,azukaru/next.js,zeit/next.js,JeromeFitz/next.js,azukaru/next.js,flybayer/next.js,azukaru/next.js,JeromeFitz/next.js,JeromeFitz/next.js,azukaru/next.js,JeromeFitz/next.js,flybayer/next.js