Update readme

README.md

@@ -11,10 +11,13 @@ See: [Official documentation](https://registry.terraform.io/providers/e-breuning
 - [Go](https://golang.org/doc/install) >= 1.14
 
 ## Supported netbox versions
-Netbox often makes API-breaking changes even in non-major releases. We aim to always support the latest minor version of Netbox. Check the table below to see which version a provider was tested against. It is generally recommended to use the provider version matching your netbox version.
+Netbox often makes breaking API changes even in non-major releases. Check the table below to see which version a provider was tested against. It is generally recommended to use the provider version matching your Netbox version. We aim to always support the latest minor version of Netbox.
+
+Since version [1.6.6](https://github.com/e-breuninger/terraform-provider-netbox/commit/0b0b2fffa54d4ab2e5f1677e948b01e56ba211c8), each version of the provider has a built-in list of all Netbox versions it supports at release time. Upon initialization, the provider will probe your Netbox version and include a (non-blocking) warning if the used Netbox version is not supported.
 
 Provider version | Netbox version
 --- | ---
+v2.0.x | v3.2.[0-4]
 v1.6.x and up| v3.1.9
 v1.1.x and up | v3.1.3
 v1.0.x | v3.0.9