feat(ec2): add c5ad instances (#16428)

Innocuous addition of c5ad instance class

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*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/@aws-cdk/aws-ec2/lib/instance-types.ts

@@ -213,6 +213,11 @@ export enum InstanceClass {
    */
   COMPUTE5_NVME_DRIVE = 'c5d',
 
+  /**
+   * Compute optimized instances with local NVME drive, 5th generation
+   */
+  C5D = 'c5d',
+
   /**
    * Compute optimized instances based on AMD EPYC, 5th generation.
    */
@@ -224,9 +229,14 @@ export enum InstanceClass {
   C5A = 'c5a',
 
   /**
-   * Compute optimized instances with local NVME drive, 5th generation
+   * Compute optimized instances with local NVME drive based on AMD EPYC, 5th generation.
    */
-  C5D = 'c5d',
+  COMPUTE5_AMD_NVME_DRIVE = 'c5ad',
+
+  /**
+   * Compute optimized instances with local NVME drive based on AMD EPYC, 5th generation.
+   */
+  C5AD = 'c5ad',
 
   /**
    * Compute optimized instances for high performance computing, 5th generation