BEG-81: Update readme to include additional index information

Author: aligent-lturner

README.md

@@ -1,9 +1,14 @@
 # magento2-prerender-io
-Provides integration between Magento 2 and [Prerender.io](https://prerender.io), giving the ability for product pages to be automatically recached when a product is updated.
+Provides integration between Magento 2 and [Prerender.io](https://prerender.io), giving the ability for pages to be automatically recached when required.
 
 ## Overview
-This module provides a new indexer, `prerender_io_product`, which will send URL recache requests to Prerender.io (in batches of up to 1000) when changes are made to products.
-This will ensure that the cache product pages are kept up-to-date at all times.
+This module provides new indexers:
+
+- `prerender_io_product`, which will send URL recache requests for products to Prerender.io (in batches of up to 1000) when changes are made to products.
+- `prerender_io_category`, which will send URL recache requests for categories to Prerender.io (in batches of up to 1000) when changes are made to categories.
+- `prerender_io_category_product`, which will send URL recache requests for categories to Prerender.io (in batches of up to 1000) when changes are made to products.
+
+These will ensure that the cached pages are kept up-to-date at all times.
 
 ## Installation
 To install via composer, simply run:
@@ -12,12 +17,12 @@ To install via composer, simply run:
 composer require aligent/magento2-prerender-io
 ```
 
-Then, ensure the module is installed and the index is set to `Schedule`:
+Then, ensure the module is installed and the indexers are set to `Schedule`:
 
 ```bash
 bin/magento module:enable Aligent_PrerenderIo
 bin/magento setup:upgrade
-bin/magento indexer:set-mode schedule prerender_io_product
+bin/magento indexer:set-mode schedule prerender_io_product prerender_io_category prerender_io_category_product
 ```
 
 ## Configuration