CI: remove deprecated macos-13 image

Author: redsun82

.github/workflows/build-ripunzip.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-22.04, macos-13, windows-2022]
+        os: [ubuntu-22.04, macos-15, windows-2022]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v5