chore: update issue-label-assign.yaml to add new alpha modules labels (#36349)

### Issue # (if applicable)

Closes #<issue number here>.

### Reason for this change

Update issue-label-assign.yml to add new alpha modules : aws-bedrock-alpha, aws-bedrock-agentcore-alpha, aws-imagebuilder-alpha.

### Description of changes

Update issue-label-assign.yml to add new alpha modules : aws-bedrock-alpha, aws-bedrock-agentcore-alpha, aws-imagebuilder-alpha.

### Describe any new or updated permissions being added




### Description of how you validated changes



### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

----

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

Author: kumsmrit

.github/workflows/issue-label-assign.yml

@@ -143,6 +143,7 @@ env:
             {"area":"@aws-cdk/aws-ecs-patterns","keywords":["aws-ecs-patterns","ecs-patterns"],"labels":["@aws-cdk/aws-ecs-patterns"]},
             {"area":"@aws-cdk/aws-efs","keywords":["aws-efs","efs","accesspoint"],"labels":["@aws-cdk/aws-efs"]},
             {"area":"@aws-cdk/aws-eks","keywords":["aws-eks","eks","fargateprofile","fargatecluster"],"labels":["@aws-cdk/aws-eks"]},
+            {"area":"@aws-cdk/aws-eks-v2-alpha", "keywords":["aws-eks-v2", "eks-v2", "aws-eks-v2-alpha"],"labels":["@aws-cdk/aws-eks-v2-alpha"]},
             {"area":"@aws-cdk/aws-elasticache","keywords":["aws-elasticache","elastic-cache"],"labels":["@aws-cdk/aws-elasticache"]},
             {"area":"@aws-cdk/aws-elasticbeanstalk","keywords":["aws-elasticbeanstalk","elastic-beanstalk"],"labels":["@aws-cdk/aws-elasticbeanstalk"]},
             {"area":"@aws-cdk/aws-elasticloadbalancing","keywords":["aws-elasticloadbalancing","elastic-loadbalancing","elb"],"labels":["@aws-cdk/aws-elasticloadbalancing"]},
@@ -289,5 +290,8 @@ env:
             {"area":"@aws-cdk/aws-s3tables-alpha", "keywords":["aws-s3tables", "aws-s3tables-alpha"],"labels":["@aws-cdk/aws-s3tables-alpha"]},
             {"area":"@aws-cdk/aws-pipes-enrichments-alpha", "keywords":["aws-pipes-enrichments", "aws-pipes-enrichments-alpha"],"labels":["@aws-cdk/aws-pipes-enrichments-alpha"]},
             {"area":"@aws-cdk/aws-pipes-sources-alpha", "keywords":["aws-pipes-sources", "aws-pipes-sources-alpha"],"labels":["@aws-cdk/aws-pipes-sources-alpha"]},
-            {"area":"@aws-cdk/aws-pipes-targets-alpha", "keywords":["aws-pipes-targets", "aws-pipes-targets-alpha"],"labels":["@aws-cdk/aws-pipes-targets-alpha"]}
+            {"area":"@aws-cdk/aws-pipes-targets-alpha", "keywords":["aws-pipes-targets", "aws-pipes-targets-alpha"],"labels":["@aws-cdk/aws-pipes-targets-alpha"]},
+            {"area":"@aws-cdk/aws-bedrock-alpha", "keywords":["aws-bedrock", "aws-bedrock-alpha"],"labels":["@aws-cdk/aws-bedrock-alpha"]},
+            {"area":"@aws-cdk/aws-bedrock-agentcore-alpha", "keywords":["aws-bedrock-agentcore", "aws-bedrock-agentcore-alpha"],"labels":["@aws-cdk/aws-bedrock-agentcore-alpha"]},
+            {"area":"@aws-cdk/aws-imagebuilder-alpha", "keywords":["aws-imagebuilder", "aws-imagebuilder-alpha"],"labels":["@aws-cdk/aws-imagebuilder-alpha"]}
           ]