ci: update pr-commentor rules matrix

This commit adds rules for release-v3.11
and removes rules for release-v3.9.

Signed-off-by: Rakshith R <rar@redhat.com>

.github/workflows/pull-request-commentor.yaml

@@ -18,7 +18,7 @@ jobs:
 
     strategy:
       matrix:
-        branch: [release-v3.9, release-v3.10, devel]
+        branch: [release-v3.10, release-v3.11, devel]
         k8s: ["1.25", "1.26", "1.27", "1.28", "1.29"]
         exclude:
           # the next Ceph-CSI version will not be tested with old Kubernetes
@@ -29,10 +29,6 @@ jobs:
           - k8s: "1.25"
             branch: "release-v3.10"
 
-          # Ceph-CSI <= 3.9 was released before Kubernetes 1.28
-          - k8s: "1.28"
-            branch: "release-v3.9"
-
           # Ceph-CSI <= 3.10 was released before Kubernetes 1.29
           - k8s: "1.29"
             branch: "release-v3.9"