Set up Docker Buildx in release build (#516)

*Issue #, if available:*
Same issue/changes as
aws-observability/aws-otel-js-instrumentation#288

*Description of changes:*


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Author: jj22ee

.github/workflows/release-build.yml

@@ -132,6 +132,9 @@ jobs:
             TEST_PYPI_TOKEN,${{ secrets.PYPI_TEST_TOKEN_SECRET_ARN }}
           parse-json-secrets: true
 
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 #3.11.1
+
       - name: Configure AWS credentials for private ECR
         uses: aws-actions/configure-aws-credentials@a03048d87541d1d9fcf2ecf528a4a65ba9bd7838 #v5.0.0
         with: