Update mac target in CI to aarch64-apple-darwin

The `macOS-latest` images on GitHub are arm:

```
Current runner version: '2.324.0'
Operating System
  macOS
  14.7.5
  23H527
Runner Image
  Image: macos-14-arm64
```

Author: LegNeato

.github/workflows/ci.yaml

@@ -23,7 +23,7 @@ jobs:
           - os: windows-2022
             target: x86_64-pc-windows-msvc
           - os: macOS-latest
-            target: x86_64-apple-darwin
+            target: aarch64-apple-darwin
     runs-on: ${{ matrix.os }}
     env:
       RUSTUP_UNPACK_RAM: "26214400"
@@ -136,7 +136,7 @@ jobs:
           - os: windows-2022
             target: x86_64-pc-windows-msvc
           - os: macOS-latest
-            target: x86_64-apple-darwin
+            target: aarch64-apple-darwin
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
@@ -163,7 +163,7 @@ jobs:
           - os: windows-2022
             target: x86_64-pc-windows-msvc
           - os: macOS-latest
-            target: x86_64-apple-darwin
+            target: aarch64-apple-darwin
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4