ci: test on aarch64 Linux

Author: kkysen

.github/workflows/ci.yml

@@ -22,6 +22,10 @@ jobs:
             os: macOS
             arch: aarch64
             clang-version: 17
+          - runner: ubuntu-24.04-arm
+            os: Linux
+            arch: aarch64
+            clang-version: 18
       fail-fast: false
     name: "test (${{ matrix.runner }}: ${{ matrix.os }} ${{ matrix.arch}}, Clang ${{ matrix.clang-version }})"
     runs-on: ${{ matrix.runner }}
@@ -98,7 +102,6 @@ jobs:
           # It's important that we keep `RUSTFLAGS` consistent between different steps
           # so that we don't have to rebuild everything.
           echo "RUSTFLAGS=-Clink-arg=-L/opt/homebrew/lib -Clink-arg=-Wl,-rpath,/opt/homebrew/lib" >> $GITHUB_ENV
-          
 
       - name: cargo build --release
         run: |