Update README

Author: willemverspyck

README.md

@@ -3,7 +3,7 @@
 Snowflake API connector in PHP
 
 ## Requirements
-PHP ^8.0
+PHP ^8.1
 
 ## Installation
 Install it using [Composer](https://getcomposer.org/):
@@ -135,4 +135,4 @@ $service->cancelStatement($results->getId());
 
 ```ResultException``` is thrown when something goes wrong or ```ParameterException``` when a required configuration is missing.
 
-More information can be found at https://docs.snowflake.com/en/developer-guide/sql-api/reference.html.
+More information can be found at https://docs.snowflake.com/en/developer-guide/sql-api/reference.html.