Image promotion for capi-vsphere v1.15.0-rc.1

Signed-off-by: fabriziopandini <fpandini@vmware.com>

Author: fabriziopandini

registry.k8s.io/images/k8s-staging-capi-vsphere/images.yaml

@@ -46,6 +46,7 @@
     "sha256:289e77421df982aa09c57faea913642e30278c8948c4e87b291385701887e944": ["v1.15.0-beta.0"]
     "sha256:2d92d305daba8b114bb89de4438576e685bb4fa0652e7c3ac2b83eb950b9b128": ["v1.15.0-beta.1"]
     "sha256:92bd7c935d0d190a3abf4b651fdc7edb912baff00a41a9af8bebc7c7de8a1e3c": ["v1.15.0-rc.0"]
+    "sha256:ef67b152aa894f827710cf6f10478ac2b7fe969071e9422a7f93c489dcf6d155": ["v1.15.0-rc.1"]
     "sha256:52e495c4af9fb3ee8c839335f0dd35f9564d3b2d22e5fe4c60cdbbe865499d28": ["v1.2.0"]
     "sha256:865d97bb28929acb82884512884b2cca97296f4b643ab0c460906e75eb038c0c": ["v1.3.0"]
     "sha256:53b404e00b79b68fe89d476055f4883b95c9d5937566b0d22d5d48b53cff101f": ["v1.3.1"]