title: Overriding html.js not working in GatsbyJS
body: <p>I'm following the <a href="https://www.gatsbyjs.org/docs/custom-html/" rel="noreferrer">directions here</a> on Gatsby's website to customize the <code>&lt;head&gt;</code> tag. I want to add Modernizr and Google's WebFont libraries. I copied <code>.cache/default-html.js</code> and put it in <code>src/html.js</code>, and then I added the script tags the libraries, but they aren't showing up on my localhost:8000. </p>
  
  <p>Is there some Gatsby cache that needs cleared when trying to do a custom <code>html.js</code>? Or is there another way to add these to the <code>&lt;head&gt;</code> tag?</p>
  
  <p>EDIT: It turns out I was trying to put a <code>&lt;script&gt;&lt;/script&gt;</code> tag in the JSX of the html.js.</p>