Clarify nested foreach referencing in Kyverno documentation

Signed-off-by: Denish Tomar <[email protected]>

content/en/docs/writing-policies/mutate.md

@@ -1168,7 +1168,7 @@ spec:
     secretName: mytlscertsecret
 ```
 
-This type of advanced mutation can be performed with nested foreach loops as shown below. Notice that in the JSON patch, the `path` value references the current index of `tls[]` as `{{elementIndex0}}` and the current index of `hosts[]` as `{{elementIndex1}}`. In the `value` field, the `{{element}}` variable still references the current value of the `hosts[]` array being processed.
+This type of advanced mutation can be performed with nested foreach loops as shown below. Notice that in the JSON patch, the `path` value references the current index of `tls[]` as `{{elementIndex0}}` and the current index of `hosts[]` as `{{elementIndex1}}`. In the `value` field, the `{{element1}}` variable still references the current value of the `hosts[]` array being processed.
 
 ```yaml
 apiVersion: kyverno.io/v1
@@ -1187,12 +1187,14 @@ spec:
       mutate:
         foreach:
           - list: request.object.spec.tls[]
+            as: element0
             foreach:
               - list: "element.hosts"
+                as: element1
                 patchesJson6902: |-
                   - path: /spec/tls/{{elementIndex0}}/hosts/{{elementIndex1}}
                     op: replace
-                    value: "{{ replace_all('{{element}}', '.old.com', '.new.com') }}"
+                    value: "{{ replace_all('{{element1}}', '.old.com', '.new.com') }}"
 ```
 
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