fix: remove deprecated macos-13 runner from CI

Author: javierpr0

.github/workflows/build.yml

@@ -17,9 +17,6 @@ jobs:
           - os: macos-latest
             target: aarch64-apple-darwin
             label: macOS-arm64
-          - os: macos-13
-            target: x86_64-apple-darwin
-            label: macOS-x86_64
           - os: ubuntu-22.04
             target: x86_64-unknown-linux-gnu
             label: Linux-x86_64