chore(deps): update dependency aws-controllers-k8s/iam-controller to v1.6.3

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Makefile

@@ -34,7 +34,7 @@ ACK_ECR_VERSION = v1.3.1
 # datasource=github-tags depName=aws-controllers-k8s/eks-controller
 ACK_EKS_VERSION = v1.9.3
 # datasource=github-tags depName=aws-controllers-k8s/iam-controller
-ACK_IAM_VERSION = v1.5.2
+ACK_IAM_VERSION = v1.6.3
 # datasource=github-tags depName=aws-controllers-k8s/s3-controller
 ACK_S3_VERSION = v1.1.0