Updates README

Adds nophase linter to README.

Author: theobarberbany

README.md

@@ -164,6 +164,7 @@ It also supports the `// +kubebuilder:validation:Optional` and `// +kubebuilder:
 
 If you prefer to use the Kubebuilder markers instead, you can change the preference in the configuration.
 
+
 ### Configuration
 
 ```yaml
@@ -201,6 +202,11 @@ It will suggest to remove the pointer from the field, and update the `json` tag
 If you prefer not to suggest fixes for pointers in required fields, you can change the `pointerPolicy` to `Warn`.
 The linter will then only suggest to remove the `omitempty` value from the `json` tag.
 
+## Nophase
+
+The `nophase` linter checks that the fields in the API types don't contain a 'Phase', or any field which contains 'Phase' as a substring, e.g MachinePhase.
+
+
 # Contributing
 
 New linters can be added by following the [New Linter][new-linter] guide.