fix: Remove redundant lerna bootstrap command

.github/workflows/ci.yml

@@ -39,9 +39,7 @@ jobs:
       - run: echo "💡 The ${{ github.repository }} repository has been cloned to the runner."
       - run: echo "🖥️ The workflow is now ready to test your code on the runner."
       - run: yarn --frozen-lockfile && yarn lerna bootstrap
-      - run: yarn --frozen-lockfile && yarn lerna bootstrap
-      - run: cd packages/backend
-      - run: yarn start
+      - run: cd packages/backend && yarn start
         env:
           ENCRYPTION_KEY: sample_encryption_key
           WEBHOOK_SECRET_KEY: sample_webhook_secret_key