chore: Expand on CAM acronym

Author: bryantbiggs

README.md

@@ -213,7 +213,7 @@ module "eks" {
 
 When enabling `authentication_mode = "API_AND_CONFIG_MAP"`, EKS will automatically create an access entry for the IAM role(s) used by managed node group(s) and Fargate profile(s). There are no additional actions required by users. For self-managed node groups and the Karpenter sub-module, this project automatically adds the access entry on behalf of users so there are no additional actions required by users.
 
-On clusters that were created prior to CAM support, there will be an existing access entry for the cluster creator. This was previously not visible when using `aws-auth` ConfigMap, but will become visible when access entry is enabled.
+On clusters that were created prior to cluster access management (CAM) support, there will be an existing access entry for the cluster creator. This was previously not visible when using `aws-auth` ConfigMap, but will become visible when access entry is enabled.
 
 ```hcl
 module "eks" {