ci: run miri on more platform

Author: Brooooooklyn

.github/workflows/CI.yml

@@ -46,13 +46,16 @@ jobs:
         run: cargo test
 
   miri:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
       - uses: actions/checkout@v5
       - name: Setup Rust
         uses: dtolnay/rust-toolchain@stable
         with:
-          targets: x86_64-unknown-linux-gnu
           components: miri
           toolchain: nightly
       - uses: actions/setup-node@v5