Update release notes for v1.27.15

content/en/blog/releases/v1.27.15.md

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+---
+title: v1.27.15
+linkTitle: v1.27.15
+date: 2024-03-19
+description: Cloud Provider Azure v1.27.15
+---
+Full Changelog: [v1.27.14..v1.27.15](https://github.com/kubernetes-sigs/cloud-provider-azure/compare/v1.27.14...v1.27.15)
+
+## Changes by Kind
+
+### Feature
+
+- Add support of service principal with cert auth for multi tenant scenario ([#5597](https://github.com/kubernetes-sigs/cloud-provider-azure/pull/5597), [@k8s-infra-cherrypick-robot](https://github.com/k8s-infra-cherrypick-robot))
+
+## Dependencies
+
+### Added
+_Nothing has changed._
+
+### Changed
+- github.com/golang/protobuf: [v1.5.3 → v1.5.4](https://github.com/golang/protobuf/compare/v1.5.3...v1.5.4)
+- google.golang.org/protobuf: v1.31.0 → v1.33.0
+- k8s.io/api: v0.27.11 → v0.27.12
+- k8s.io/apimachinery: v0.27.11 → v0.27.12
+- k8s.io/apiserver: v0.27.11 → v0.27.12
+- k8s.io/client-go: v0.27.11 → v0.27.12
+- k8s.io/cloud-provider: v0.27.11 → v0.27.12
+- k8s.io/component-base: v0.27.11 → v0.27.12
+- k8s.io/component-helpers: v0.27.11 → v0.27.12
+- k8s.io/controller-manager: v0.27.11 → v0.27.12
+- k8s.io/kms: v0.27.11 → v0.27.12
+- k8s.io/kubelet: v0.27.11 → v0.27.12
+
+### Removed
+_Nothing has changed._