Minor syntax highlighting change for code blocks

Better HTML and SASS code highlighting

README.md

@@ -34,7 +34,7 @@ When using CSS classes, you can simply add the class with the filter name to the
 
 For example:
 
-```
+```html
 <!-- HTML -->
 <figure class="aden">
   <img src="../img.png">
@@ -78,14 +78,14 @@ If you use custom naming in your CSS architecture, you can add the `.scss` files
 
 For example:
 
-```
+```html
 <!-- HTML -->
 <figure class="viz--beautiful">
   <img src="../img.png">
 </figure>
 ```
 
-```
+```sass
 // Sass
 .viz--beautiful {
   @extend %aden;
@@ -165,4 +165,4 @@ Filters are really fun to create! Reference photos created by [Miles Croxford](h
 - `site/` is the public facing website
 - `site/test` is how you test filters if you're developing, remember to change `is_done` for the filter you're creating in `site/filters.json`.
 
-Note: this will also have mixin options and a PostCSS Component.
+Note: this will also have mixin options and a PostCSS Component.