Update .gitlab-ci.yml

.gitlab-ci.yml

@@ -48,7 +48,7 @@ Deploy to Kubernetes:
     - mv ./kubectl /usr/local/bin/kubectl
     - kubectl version
     - cd k8s
-    - sed -i "s|##IMAGETAG##|${CI_COMMIT_REF_NAME}|" deployment.yaml
+    - sed -i "s|##IMAGETAG##|${CI_COMMIT_REF_NAME}|" deployment.yml
     - kubectl apply -f deployment.yml
   only:
     - tags