Feat: Support ARM64 platform in XGBoost examples (#2114)

Signed-off-by: tico88612 <17496418+tico88612@users.noreply.github.com>

.github/workflows/publish-example-images.yaml

@@ -10,7 +10,7 @@ jobs:
     uses: ./.github/workflows/build-and-publish-images.yaml
     with:
       component-name: ${{ matrix.component-name }}
-      platforms: ${{matrix.platforms}}
+      platforms: ${{ matrix.platforms }}
       dockerfile: ${{ matrix.dockerfile }}
       context: ${{ matrix.context }}
     secrets:
@@ -45,12 +45,15 @@ jobs:
             dockerfile: examples/pytorch/cpu-demo/Dockerfile
             context: examples/pytorch/cpu-demo
           - component-name: xgboost-dist-iris
+            platforms: linux/amd64,linux/arm64
             dockerfile: examples/xgboost/xgboost-dist/Dockerfile
             context: examples/xgboost/xgboost-dist
           - component-name: lightgbm-dist-py-test
+            platforms: linux/amd64,linux/arm64
             dockerfile: examples/xgboost/lightgbm-dist/Dockerfile
             context: examples/xgboost/lightgbm-dist
           - component-name: xgboost-dist-rabit-test
+            platforms: linux/amd64,linux/arm64
             dockerfile: examples/xgboost/smoke-dist/Dockerfile
             context: examples/xgboost/smoke-dist
           - component-name: mxnet-gpu