fix: use correct name for merge step

Author: 0marperez

.github/workflows/merge-main.yml

@@ -8,7 +8,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - name: Configure Gradle
+      - name: Merge main
         uses: awslabs/aws-kotlin-repo-tools/.github/actions/merge-main@main
         with:
           exempt-branches: # Add any if required