Update release notes for v1.28.8

content/en/blog/releases/v1.28.8.md

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+---
+title: v1.28.8
+linkTitle: v1.28.8
+date: 2024-03-22
+description: Cloud Provider Azure v1.28.8
+---
+Full Changelog: [v1.28.7..v1.28.8](https://github.com/kubernetes-sigs/cloud-provider-azure/compare/v1.28.7...v1.28.8)
+
+## Changes by Kind
+
+### Feature
+
+- When user-provided `LoadBalancerSourceRanges` or `azure-allowed-ip-ranges` are not valid network prefixes, cloud-controller-manager skips these invalid ranges, emits a warning event, and adds a deny-All rule in nsg. ([#5751](https://github.com/kubernetes-sigs/cloud-provider-azure/pull/5751), [@jwtty](https://github.com/jwtty))
+
+### Bug or Regression
+
+- Fix NSG DenyAll rule priority ([#5763](https://github.com/kubernetes-sigs/cloud-provider-azure/pull/5763), [@lodrem](https://github.com/lodrem))
+
+## Dependencies
+
+### Added
+_Nothing has changed._
+
+### Changed
+- github.com/onsi/ginkgo/v2: [v2.16.0 → v2.17.0](https://github.com/onsi/ginkgo/compare/v2.16.0...v2.17.0)
+
+### Removed
+_Nothing has changed._