SCL: add cluster-api-provider-nested repo

Author: nikhita

sig-cluster-lifecycle/README.md

@@ -103,6 +103,9 @@ The following [subprojects][subproject-definition] are owned by sig-cluster-life
 ### cluster-api-provider-ibmcloud
 - **Owners:**
   - https://raw.githubusercontent.com/kubernetes-sigs/cluster-api-provider-ibmcloud/master/OWNERS
+### cluster-api-provider-nested
+- **Owners:**
+  - https://raw.githubusercontent.com/kubernetes-sigs/cluster-api-provider-nested/master/OWNERS
 ### cluster-api-provider-openstack
 - **Owners:**
   - https://raw.githubusercontent.com/kubernetes-sigs/cluster-api-provider-openstack/master/OWNERS

sigs.yaml

@@ -970,6 +970,9 @@ sigs:
   - name: cluster-api-provider-ibmcloud
     owners:
     - https://raw.githubusercontent.com/kubernetes-sigs/cluster-api-provider-ibmcloud/master/OWNERS
+  - name: cluster-api-provider-nested
+    owners:
+    - https://raw.githubusercontent.com/kubernetes-sigs/cluster-api-provider-nested/master/OWNERS
   - name: cluster-api-provider-openstack
     owners:
     - https://raw.githubusercontent.com/kubernetes-sigs/cluster-api-provider-openstack/master/OWNERS