Update macOS runner versions in CI

- Update macos-13 to macos-15-intel for x86_64 builds.
- Update macos-14 to macos-15 for aarch64 builds.

Author: PythonicNinja

.github/workflows/release.yml

@@ -24,9 +24,9 @@ jobs:
           - os: ubuntu-latest
             target: aarch64-unknown-linux-gnu
             linker: aarch64-linux-gnu-gcc
-          - os: macos-13
+          - os: macos-15-intel
             target: x86_64-apple-darwin
-          - os: macos-14
+          - os: macos-15
             target: aarch64-apple-darwin
           - os: windows-latest
             target: x86_64-pc-windows-msvc