Optimize zip command for release packaging

Author: dimitrisalo

.github/workflows/release.yml

@@ -31,7 +31,7 @@ jobs:
           echo "release_suffix=${release_suffix}" >> $GITHUB_OUTPUT
           zip_name="apache-iceberg-monitoring-${release_suffix}.zip"
           cd .aws-sam/build/IcebergMetricsLambda
-          zip -r "../../../${zip_name}" .
+          zip -9 -r "../../../${zip_name}" .
           echo "zip_name=${zip_name}" >> $GITHUB_OUTPUT
 
       - name: Create Release and Upload Asset (gh CLI)
@@ -42,4 +42,4 @@ jobs:
           gh release create "apache-iceberg-monitoring-${{ steps.zip.outputs.release_suffix }}" \
             --title "apache-iceberg-monitoring-${{ steps.zip.outputs.release_suffix }}" \
             --target ${{ github.sha }} \
-            ./${{ steps.zip.outputs.zip_name }}
+            ./${{ steps.zip.outputs.zip_name }}