change action branch to main

Author: 0marperez

.github/workflows/service-ci.yml

@@ -28,7 +28,7 @@ jobs:
           env-vars-for-codebuild: GITHUB_REPOSITORY, UPLOAD, RELEASE_METRICS, IDENTIFIER
 
       - name: Process metrics
-        uses: awslabs/aws-kotlin-repo-tools/.github/actions/artifact-size-metrics/download-and-process@asm-v2 # TODO: Change to main before merging
+        uses: awslabs/aws-kotlin-repo-tools/.github/actions/artifact-size-metrics/download-and-process@main
         with:
           download: 'true'