Fix examples to use from_yaml filter with lookup (#65424)

The documentation says to use `from_yaml` filter when using `lookup`  from node executor. Now the examples do too.

lib/ansible/modules/clustering/k8s/k8s.py

@@ -202,24 +202,24 @@ EXAMPLES = '''
     If the definition file has been encrypted with Ansible Vault it will automatically be decrypted.
   k8s:
     state: present
-    definition: "{{ lookup('file', '/testing/deployment.yml') }}"
+    definition: "{{ lookup('file', '/testing/deployment.yml') | from_yaml }}"
 
 - name: Read definition file from the Ansible controller file system after Jinja templating
   k8s:
     state: present
-    definition: "{{ lookup('template', '/testing/deployment.yml') }}"
+    definition: "{{ lookup('template', '/testing/deployment.yml') | from_yaml }}"
 
 - name: fail on validation errors
   k8s:
     state: present
-    definition: "{{ lookup('template', '/testing/deployment.yml') }}"
+    definition: "{{ lookup('template', '/testing/deployment.yml')  | from_yaml }}"
     validate:
       fail_on_error: yes
 
 - name: warn on validation errors, check for unexpected properties
   k8s:
     state: present
-    definition: "{{ lookup('template', '/testing/deployment.yml') }}"
+    definition: "{{ lookup('template', '/testing/deployment.yml') | from_yaml }}"
     validate:
       fail_on_error: no
       strict: yes