ci: add macos-15-intel to matrix

And fix a stupid typo that made GHA skip running the tests 🤦

.github/workflows/CI-unix.yml

@@ -80,7 +80,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-14, macos-15]
+        os: [macos-14, macos-15, macos-15-intel]
     steps:
       - uses: actions/checkout@v6
       - name: Envinfo
@@ -107,11 +107,11 @@ jobs:
         run: |
           ./build/uv_run_tests_a platform_output
       - name: Test
-        if: ${{ maxtrix.os == 'macos-15' }}
+        if: ${{ matrix.os == 'macos-15' || matrix.os == 'macos-15-intel' }}
         run: |
           cd build && sudo UV_RUN_AS_ROOT=1 ctest -V
       - name: Test
-        if: ${{ maxtrix.os != 'macos-15' }}
+        if: ${{ matrix.os != 'macos-15' && matrix.os != 'macos-15-intel' }}
         run: |
           cd build && ctest -V
       - name: Autotools configure