add CI on aarch64

Author: wx257osn2

.github/workflows/ci.yaml

@@ -8,7 +8,10 @@ on:
 
 jobs:
   ci:
-    runs-on: ubuntu-24.04
+    strategy:
+      matrix:
+        os: [ubuntu-24.04, ubuntu-24.04-arm]
+    runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v4
       with:
@@ -17,7 +20,7 @@ jobs:
       with:
         url_format: 'https://github.com/wx257osn2/qoi-benchmark/releases/download/{}'
         version: image-v20250302
-    - uses: actions/cache@v4
+    - uses: actions/cache/restore@v4
       id: cached
       with:
         path: images
@@ -26,6 +29,11 @@ jobs:
       if: steps.cached.outputs.cache-hit != 'true'
       shell: bash
       run: curl https://qoiformat.org/benchmark/qoi_benchmark_suite.tar | tar x
+    - uses: actions/cache/save@v4
+      if: steps.cached.outputs.cache-hit != 'true' && matrix.os == 'ubuntu-24.04'
+      with:
+        path: images
+        key: ${{ steps.cached.outputs.cache-primary-key }}
     - name: build
       shell: bash
       run: cxx-env-run make -j