ci: use macos-15-intel runners

Author: eval-exec

.github/workflows/ci.yaml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ ubuntu-latest, macos-13, windows-latest ]
+        os: [ ubuntu-latest, macos-15-intel, windows-latest ]
     steps:
       - uses: actions/checkout@v3
       - uses: dtolnay/rust-toolchain@stable
@@ -39,7 +39,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ ubuntu-latest, macos-13 ]
+        os: [ ubuntu-latest, macos-15-intel ]
     steps:
       - uses: actions/checkout@v2
       - uses: dtolnay/rust-toolchain@stable
@@ -52,7 +52,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ ubuntu-latest, macos-13 ]
+        os: [ ubuntu-latest, macos-15-intel ]
     steps:
       - uses: actions/checkout@v2
       - uses: dtolnay/rust-toolchain@stable