Merge pull request GoogleCloudPlatform#1238 from maqiuyujoyce/202402-v1beta1-promotion-instructions

Add instructions for v1alpha1 to v1beta1 promotion

Author: google-oss-prow[bot]

README.NewResourceFromTerraform.md

@@ -174,6 +174,14 @@ ServiceMappings file. Add the `ResourceConfig` for your resource:
     similar resources, and the comments in
     [pkg/apis/core/v1alpha1/servicemapping_types.go](pkg/apis/core/v1alpha1/servicemapping_types.go).
 
+1.  If you are adding a resource that is already supported in v1alpha1, specify
+    the following fields
+    ([example](https://github.com/GoogleCloudPlatform/k8s-config-connector/blob/8ba13a0c1e0563e0e6f9a9f6eeb8a693f9c73acf/config/servicemappings/certificatemanager.yaml#L30-L31)):
+    1.  Set `v1alpha1ToV1beta1` to `true`.
+    1.  Set `storageVersion` to `v1alpha1`.
+
+1.  Ensure the `autoGenerated` field is unset.
+
 1.  Add `resourceID` if the resource has the resource ID. The value of
     `targetField` should be the field name of the user-specified resource ID
     field (value of `metadataMapping.name`) or the field name of the