fix(docs): fix for Apollo error

Author: amjedidiah

README.md

@@ -33,6 +33,12 @@ Add an `.env.local` file to the root with the following:
 WORDPRESS_GRAPHQL_ENDPOINT="http://wordpressite.com/graphql"
 ```
 
+In some cases, the above may not work.
+Change it as follows:
+```
+WORDPRESS_GRAPHQL_ENDPOINT="http://yourhost.com/index.php?graphql
+```
+
 ## 🚀 Getting Started
 
 ### What is this and what does it include?