Merge pull request #10806 from andy108369/fix-doc

docs: change [null] to []

Documentation/Storage-Configuration/ceph-teardown.md

@@ -164,7 +164,7 @@ If for some reason the operator is not able to remove the finalizer (i.e., the o
 ```console
 for CRD in $(kubectl get crd -n rook-ceph | awk '/ceph.rook.io/ {print $1}'); do
     kubectl get -n rook-ceph "$CRD" -o name | \
-    xargs -I {} kubectl patch -n rook-ceph {} --type merge -p '{"metadata":{"finalizers": [null]}}'
+    xargs -I {} kubectl patch -n rook-ceph {} --type merge -p '{"metadata":{"finalizers": []}}'
 done
 ```
 
@@ -196,6 +196,6 @@ The operator is responsible for removing the finalizers when a CephCluster is de
 If for some reason the operator is not able to remove the finalizers (i.e., the operator is not running anymore), you can remove the finalizers manually with the following commands:
 
 ```console
-kubectl -n rook-ceph patch configmap rook-ceph-mon-endpoints --type merge -p '{"metadata":{"finalizers": [null]}}'
-kubectl -n rook-ceph patch secrets rook-ceph-mon --type merge -p '{"metadata":{"finalizers": [null]}}'
+kubectl -n rook-ceph patch configmap rook-ceph-mon-endpoints --type merge -p '{"metadata":{"finalizers": []}}'
+kubectl -n rook-ceph patch secrets rook-ceph-mon --type merge -p '{"metadata":{"finalizers": []}}'
 ```