Update quay.io/artemiscloud/activemq-artemis-operator Docker tag to v1.2.6

Signed-off-by: red-hat-konflux <126015336+red-hat-konflux[bot]@users.noreply.github.com>

Author: red-hat-konflux[bot]

config/manager/kustomization.yaml

@@ -14,4 +14,4 @@ kind: Kustomization
 images:
 - name: controller
   newName: quay.io/artemiscloud/activemq-artemis-operator
-  newTag: 1.2.5
+  newTag: 1.2.6