feat(ci): run tests on x86_64 and ARM64

Author: not-matthias

.github/workflows/ci.yml

@@ -17,7 +17,10 @@ jobs:
           extra_args: --all-files
 
   tests:
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: [ubuntu-latest, ubuntu-24.04-arm]
+    runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
       - uses: mlugg/setup-zig@v1
@@ -28,7 +31,7 @@ jobs:
       - name: Run valgrind tests
         run: |
           sudo apt-get install -y valgrind
-          just test-valgrind
+          ./scripts/test-valgrind.sh
 
   build:
     strategy: