fix: get rid of secrets

Author: 0marperez

.github/workflows/sync-mirror.yml

@@ -7,13 +7,14 @@ on:
 
 jobs:
   git-sync:
+    # Only sync when pushing to source repo
     if: github.repository == 'awslabs/aws-sdk-kotlin'
     runs-on: ubuntu-latest
     steps:
       - name: git-sync
         uses: wei/git-sync@v3
         with:
-          source_repo: "https://${{ secrets.CI_USER }}:${{ secrets.CI_USER_PAT }}@github.com/awslabs/aws-sdk-kotlin.git"
+          source_repo: "https://aws-sdk-kotlin-ci:${{ secrets.CI_USER_PAT }}@github.com/awslabs/aws-sdk-kotlin.git"
           source_branch: "main"
-          destination_repo: "https://${{ secrets.CI_USER }}:${{ secrets.CI_USER_PAT }}@github.com/${{ secrets.GIT_SYNC_DESTINATION_REPO }}.git"
+          destination_repo: "https://aws-sdk-kotlin-ci:${{ secrets.CI_USER_PAT }}@github.com/awslabs/private-aws-sdk-kotlin-staging.git"
           destination_branch: "main"