chore(bedrock): add TwelveLabs Marengo 2.7 and Pegasus 1.2

Author: phuhung273

packages/aws-cdk-lib/aws-bedrock/lib/foundation-model.ts

@@ -461,6 +461,12 @@ export class FoundationModelIdentifier {
   /** Base model "writer.palmyra-x5-v1:0". */
   public static readonly WRITER_PALMYRA_X5_V1_0 = new FoundationModelIdentifier('writer.palmyra-x5-v1:0');
 
+  /** Base model "twelvelabs.marengo-embed-2-7-v1:0". */
+  public static readonly TWELVELABS_MARENGO_EMBED_2_7_V1_0 = new FoundationModelIdentifier('twelvelabs.marengo-embed-2-7-v1:0');
+
+  /** Base model "twelvelabs.pegasus-1-2-v1:0". */
+  public static readonly TWELVELABS_PEGASUS_1_2_V1_0 = new FoundationModelIdentifier('twelvelabs.pegasus-1-2-v1:0');
+
   /**
    * Constructor for foundation model identifier
    * @param modelId the model identifier