fix: use manylinux_2_28 for aarch64 cross-compilation

The manylinux2014 (CentOS 7) cross-compiler is too old for ring's ARM
assembly — GCC doesn't define __ARM_ARCH. manylinux_2_28 (AlmaLinux 8)
has a newer toolchain that works.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: rand

.github/workflows/release.yml

@@ -17,8 +17,10 @@ jobs:
             target: aarch64-apple-darwin
           - os: ubuntu-latest
             target: x86_64-unknown-linux-gnu
+            manylinux: auto
           - os: ubuntu-latest
             target: aarch64-unknown-linux-gnu
+            manylinux: 2_28
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
@@ -39,7 +41,7 @@ jobs:
         with:
           target: ${{ matrix.target }}
           args: --release --out dist --find-interpreter
-          manylinux: auto
+          manylinux: ${{ matrix.manylinux || 'auto' }}
 
       - name: Upload wheel artifact
         uses: actions/upload-artifact@v4