Update README.md (#84)

README.md

@@ -114,7 +114,7 @@ To set up Firestore, follow the [Firestore quickstart documentation](https://fir
 
 Next, navigate to the `Rules` tab and paste the following rules:
 
-```json
+```js
 rules_version = '2';
 service cloud.firestore {
   match /databases/{database}/documents {
@@ -181,4 +181,4 @@ If the website is hosted:
 - locally, then the item(s) will be updated to match the current contents of [public\items.yml](public\items.yml).
 - on GitHub Pages, then the item(s) will be updated to match the current contents of (your equivalent of) https://hmellor.github.io/auction-website/items.yml (i.e. whatever you last pushed and deployed to GitHub Pages).
 
-> _N.B. The loading of the item data, which happens for both the update **and** delete buttons, can cause the buttons to be a little slow to react._
+> _N.B. The loading of the item data, which happens for both the update **and** delete buttons, can cause the buttons to be a little slow to react._