github: Update CentOS CI status check for Mergify

We recently updated our CI job on CentOS infra to consume Kuberentes
v1.26. Therefore update the corresponding status check in Mergify
configuration to indicate new version.

Signed-off-by: Anoop C S <[email protected]>

Author: anoopcs9

.github/mergify.yml

@@ -20,7 +20,7 @@ queue_rules:
       - check-success=dockerbuild
       - check-success=test
       - check-success=test-kubernetes
-      - check-success=centos-ci/sink-clustered/mini-k8s-1.25
+      - check-success=centos-ci/sink-clustered/mini-k8s-1.26
       - check-success=dpulls
 
 
@@ -42,7 +42,7 @@ pull_request_rules:
       - check-success=dockerbuild
       - check-success=test
       - check-success=test-kubernetes
-      - check-success=centos-ci/sink-clustered/mini-k8s-1.25
+      - check-success=centos-ci/sink-clustered/mini-k8s-1.26
       - check-success=dpulls
       - "-draft"
       # Contributors should set the 'do-not-merge' label if they don't want