Merge pull request #8424 from mboersma/cluster-api-azure-v1.21.0-image-promotion

Image promotion for cluster-api-azure v1.21.0

Author: k8s-ci-robot

registry.k8s.io/images/k8s-staging-cluster-api-azure/images.yaml

@@ -103,6 +103,7 @@
     "sha256:77099abb55fed671227ece6f83944e51c014808884fd1836cc1bcda49a8dcd92": ["v1.20.0"]
     "sha256:5944d9a55fedfdc76c568244b72fd8b97e25a9499dde005359cbae63eda7dbcf": ["v1.20.1"]
     "sha256:bf35cbba21f3af03c846b8b810fdddd036474241c7e44842630688bfb6b0178d": ["v1.20.2"]
+    "sha256:6cf29a32280b7aca7fb6010c60f0cc3f0633609af851d6f770cfc620a0806c88": ["v1.21.0"]
     "sha256:ae274d73d389ef2832f6d8d113205c78644523a4528faac1cd2a3437ff38180e": ["v1.3.0"]
     "sha256:b7575c821cf077a13c76d149707f89f07dfc7b5d1bba508cfa8a1317ffa724a6": ["v1.3.1"]
     "sha256:eb087ef72883bdbeb5778b1fdc65a66d2fd6f8689cad03b326c8e3369d670262": ["v1.3.2"]