fix: leverage windows-11-arm for Windows ARM builds (#3062)

This is in support of https://github.com/openai/codex/issues/2979.

Once we have a release out, we can update the npm module and the VS Code
extension to take advantage of this.

.github/workflows/rust-release.yml

@@ -72,6 +72,8 @@ jobs:
             target: aarch64-unknown-linux-gnu
           - runner: windows-latest
             target: x86_64-pc-windows-msvc
+          - runner: windows-11-arm
+            target: aarch64-pc-windows-msvc
 
     steps:
       - uses: actions/checkout@v5