Add CKS to the training_certifications list offered by Elastisys (KCNTP)

Signed-off-by: jakubkrzywda<[email protected]>

Author: jakubkrzywda

landscape.yml

@@ -13973,7 +13973,7 @@ landscape:
             logo: elastisys.svg
             crunchbase: https://www.crunchbase.com/organization/elastisys
             extra:
-              training_certifications: cka, ckad, kcna
+              training_certifications: cka, ckad, cks, kcna
               training_type: e-learning, instructor-led
           - item:
             name: Entigo (KCNTP)