Use existing GitHubBenchmarkRole for AMI prebuild

Signed-off-by: Claude <[email protected]>

Author: joseph-isaacs

.github/workflows/ami-prebuild.yml

@@ -52,7 +52,7 @@ jobs:
       - name: Configure AWS Credentials
         uses: aws-actions/configure-aws-credentials@v4
         with:
-          role-to-assume: arn:aws:iam::375504701696:role/GitHubAMIBuilderRole
+          role-to-assume: arn:aws:iam::375504701696:role/GitHubBenchmarkRole
           aws-region: ${{ env.AWS_REGION }}
 
       - name: Build AMI
@@ -89,7 +89,7 @@ jobs:
       - name: Configure AWS Credentials
         uses: aws-actions/configure-aws-credentials@v4
         with:
-          role-to-assume: arn:aws:iam::375504701696:role/GitHubAMIBuilderRole
+          role-to-assume: arn:aws:iam::375504701696:role/GitHubBenchmarkRole
           aws-region: ${{ env.AWS_REGION }}
 
       - name: Build AMI