fix feeding data

Author: Slashek

app/views/pages/best-practices/amp/feeding-data-amp-pages-graphql.liquid

@@ -68,7 +68,7 @@ Include the AMP dependencies in the layout file `app/views/layouts/application.l
 
 * The data source for `<amp-list>` is `products.json`.
 * `amp-mustache` enables the 'mustache' (double curly braces) templating syntax.
-* The `{{ "{% raw" }} %}` tag instructs the liquid preprocessor not to interpret the liquid tags and leaves them to AMP/mustache to process.
+* The {% raw %}`{% raw %}`{% endraw %} block tag instructs the liquid preprocessor not to interpret liquid code and leaves them to AMP/mustache to process.
 
 
 ### Step 2: Create JSON endpoint