Merge pull request #2956 from sonasingh46/bump-aad-to-1.8.14

bump aad-pod-identity image to v1.8.14 on branch release-1.6

Author: k8s-ci-robot

config/default/aad-pod-identity-deployment.yaml

@@ -286,7 +286,7 @@ spec:
           type: FileOrCreate
       containers:
       - name: nmi
-        image: "mcr.microsoft.com/oss/azure/aad-pod-identity/nmi:v1.8.9"
+        image: "mcr.microsoft.com/oss/azure/aad-pod-identity/nmi:v1.8.14"
         imagePullPolicy: IfNotPresent
         args:
           - "--node=$(NODE_NAME)"