github: use macos-14, add new aarch64-apple-darwin release binary

GitHub announced these new Apple Silicon based runners today. Let's take them
for a spin.

Let's also add an entry in the release matrix to build and publish `aarch64-
apple-darwin` binaries, too. This doesn't migrate the old release matrix entry;
it still uses a `macos-11` runner. This means the x86 binaries should work on a
few older macOS versions if users need it.

Signed-off-by: Austin Seipp <[email protected]>

.github/workflows/build.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-13, windows-latest]
+        os: [ubuntu-latest, macos-14, windows-latest]
         cargo_flags: [""]
         include:
         - os: ubuntu-latest

.github/workflows/release.yml

@@ -17,14 +17,17 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        build: [linux-musl, macos, win-msvc]
+        build: [linux-musl, macos-x86_64, macos-aarch64, win-msvc]
         include:
         - build: linux-musl
           os: ubuntu-20.04
           target: x86_64-unknown-linux-musl
-        - build: macos
+        - build: macos-x86_64
           os: macos-11
           target: x86_64-apple-darwin
+        - build: macos-aarch64
+          os: macos-14
+          target: aarch64-apple-darwin
         - build: win-msvc
           os: windows-2022
           target: x86_64-pc-windows-msvc