Add checksum-offloading-disabling to release notes (#9073)

Author: danudey

release-notes/v3.28.1-release-notes.md

@@ -13,6 +13,7 @@
 
  - Add IPReservation and BGPFilter to etcd datastore migration [calico #9056](https://github.com/projectcalico/calico/pull/9056) (@caseydavenport)
  - Update k8s to v1.28.12 [calico #9040](https://github.com/projectcalico/calico/pull/9040) (@coutinhop)
+ - Disable checksum offloading for VXLAN devices [calico #9037](https://github.com/projectcalico/calico/pull/9037)
  - Update go version to v1.22.5, node-driver-registrar to v2.11.1 [calico #9030](https://github.com/projectcalico/calico/pull/9030) (@coutinhop)
  - ebpf: don't drop, but reject unknown midflow tcp packets with rst [calico #8970](https://github.com/projectcalico/calico/pull/8970) (@sridhartigera)
  - ebpf: set bpfin/out.cali MTU to the smallest of all host ifaces including overlay. That means if jumbo frames are used, this device also uses them. [calico #8954](https://github.com/projectcalico/calico/pull/8954) (@tomastigera)