Set up Docker Buildx in release build (aws-observability#517)

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

*Description of changes:*


By submitting this pull request, I confirm that you can use, modify,
copy, and redistribute this contribution, under the terms of your
choice.

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: