Update macOS-13 to macOS-15-intel in workflow OS matrix definitions

Author: alemuntoni

.github/workflows/BuildMeshLab.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: ['ubuntu-22.04', 'ubuntu-22.04-arm', 'macos-13', 'macos-latest', 'windows-latest']
+        os: ['ubuntu-22.04', 'ubuntu-22.04-arm', 'macos-15-intel', 'macos-latest', 'windows-latest']
         precision: [single_precision, double_precision]
     steps:
     - uses: actions/checkout@v4

.github/workflows/CreateRelease.yml

@@ -34,7 +34,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: ['ubuntu-22.04', 'ubuntu-22.04-arm', 'macos-13', 'macos-latest', 'windows-latest']
+        os: ['ubuntu-22.04', 'ubuntu-22.04-arm', 'macos-15-intel', 'macos-latest', 'windows-latest']
         precision: [single_precision, double_precision]
     steps:
     - uses: actions/checkout@v4