ci: use macos-15-intel for release matrix

Author: Rex

.github/workflows/release.yml

@@ -18,7 +18,7 @@ jobs:
           - os: ubuntu-latest
             target: x86_64-unknown-linux-gnu
             bin: target/release/rexos
-          - os: macos-13
+          - os: macos-15-intel
             target: x86_64-apple-darwin
             bin: target/release/rexos
           - os: macos-14