While mirroring nvidia operator with oc-mirror 4.13 version, ImageContentSourcePolicy is not getting created properly 

1. Create imageset file

kind: ImageSetConfiguration
apiVersion: mirror.openshift.io/v1alpha2
archiveSize: 4
storageConfig:
  local:
    path: /home/name/nvidia
mirror:
  operators:
  - catalog: registry.redhat.io/redhat/certified-operator-index:v4.11
    packages:
    - name: nvidia-network-operator

2. mirror to disk using oc-mirror 4.13
$oc-mirror -c imageset.yaml file:///home/name/nvidia/
./oc-mirror version
Client Version: version.Info{Major:"", Minor:"", GitVersion:"4.13.0-202307242035.p0.gf11a900.assembly.stream-f11a900", GitCommit:"f11a9001caad8fe146c73baf2acc38ddcf3642b5", GitTreeState:"clean", BuildDate:"2023-07-24T21:25:46Z", GoVersion:"go1.19.10 X:strictfipsruntime", Compiler:"gc", Platform:"linux/amd64"}

3. Now generate the manifest

$ oc-mirror --from /home/name/nvidia/ docker://registry:8443 --manifests-only

- mirrors:
    - registry:8443/nvidia/cloud-native
    source: nvcr.io/nvidia

However the correct mapping should be:
    - mirrors:
        - registry/nvidia
      source: nvcr.io/nvidia

4. perform same step with 4.12.0 version you will not hit this issue. 
./oc-mirror version
Client Version: version.Info{Major:"", Minor:"", GitVersion:"4.12.0-202304241542.p0.g5fc00fe.assembly.stream-5fc00fe", GitCommit:"5fc00fe735d8fb3b6125f358f5d6b9fe726fad10", GitTreeState:"clean", BuildDate:"2023-04-24T16:01:29Z", GoVersion:"go1.19.6", Compiler:"gc", Platform:"linux/amd64"}