Add Aarch64 CI

Author: ZhongRuoyu

.github/workflows/build.yml

@@ -24,7 +24,8 @@ jobs:
         include:
           - arch: x86_64
             runs-on: ubuntu-latest
-          # TODO: add aarch64 when available
+          - arch: aarch64
+            runs-on: ubuntu-24.04-arm
     runs-on: ${{matrix.runs-on}}
     name: ${{matrix.binary}} (${{matrix.arch}})
     env: