docs: Fix the k8sSearch example (#567)

Author: siegfriedweber

docs/modules/secret-operator/pages/secretclass.adoc

@@ -362,16 +362,12 @@ Please note that the contents in the volume will not update when the Secret cont
 
 [source,yaml]
 ----
-apiVersion: apps/v1
+---
+apiVersion: v1
 kind: Pod
 metadata:
   name: my-app
-  labels:
-    app.kubernetes.io/name: my-app
 spec:
-  selector:
-    matchLabels:
-      app.kubernetes.io/name: my-app
   containers:
     #... skipped for brevity
     volumeMounts:
@@ -409,15 +405,15 @@ metadata:
   name: my-admin-credentials
   labels:
     secrets.stackable.tech/class: admin-credentials-class
+    secrets.stackable.tech/pod: my-app
 stringData:
   user: admin
   password: secret
 ----
 
 
 xref:scope.adoc[Scopes] are translated into additional label filters of the form `secrets.stackable.tech/$SCOPE: $SCOPE_VALUE`.
-For example, a `Pod` named `foo` mounting a `k8sSearch` secret with the xref:scope.adoc#pod[`pod`] scope would add the label filter
-`secrets.stackable.tech/pod: foo`.
+For example, a Pod named `foo` mounting a `k8sSearch` Secret with the xref:scope.adoc#pod[`pod`] scope would add the label filter `secrets.stackable.tech/pod: foo`.
 
 ==== Reference