Image promotion for cluster-api-azure v1.20.4

Signed-off-by: Jon Huhn <nojnhuh@users.noreply.github.com>

Author: nojnhuh

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

@@ -104,6 +104,7 @@
     "sha256:5944d9a55fedfdc76c568244b72fd8b97e25a9499dde005359cbae63eda7dbcf": ["v1.20.1"]
     "sha256:bf35cbba21f3af03c846b8b810fdddd036474241c7e44842630688bfb6b0178d": ["v1.20.2"]
     "sha256:52d21424306146d16d82ebff699ab489e8b9b58e5859d226bb93e41b5402fa76": ["v1.20.3"]
+    "sha256:90a355f701627aae57e7a23fe1d18de12c76a336a3a1e9a90d35d7767db2e558": ["v1.20.4"]
     "sha256:6cf29a32280b7aca7fb6010c60f0cc3f0633609af851d6f770cfc620a0806c88": ["v1.21.0"]
     "sha256:b6218da9547ccd302c2c82afffe339aa6671e72ad1c125d37e114bc28c1a1879": ["v1.21.1"]
     "sha256:ae274d73d389ef2832f6d8d113205c78644523a4528faac1cd2a3437ff38180e": ["v1.3.0"]