feat: Add armv7a target to CI workflow

Author: luodeb

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
       fail-fast: false
       matrix:
         rust-toolchain: [nightly]
-        targets: [x86_64-unknown-linux-gnu, x86_64-unknown-none, riscv64gc-unknown-none-elf, aarch64-unknown-none-softfloat, loongarch64-unknown-none-softfloat]
+        targets: [x86_64-unknown-linux-gnu, x86_64-unknown-none, riscv64gc-unknown-none-elf, aarch64-unknown-none-softfloat, loongarch64-unknown-none-softfloat, armv7a-none-eabi]
     steps:
     - uses: actions/checkout@v4
     - uses: dtolnay/rust-toolchain@nightly