Fix failing Clang builds on GitHub Actions (nonstd-lite issue 75, thanks @striezel)

Author: martinmoene

.github/workflows/ci.yml

@@ -49,29 +49,27 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-24.04]
-        version: [14, 16, 18]
         include:
-          - os: ubuntu-22.04
-            version: 11
-          - os: ubuntu-22.04
-            version: 12
+          - version: 11
+            os: 'ubuntu-22.04'
+          - version: 12
+            os: 'ubuntu-22.04'
+          - version: 17
+            os: 'ubuntu-24.04'
 
     runs-on: ${{ matrix.os }}
 
     steps:
       - uses: actions/checkout@v4
 
       - name: Install Clang ${{ matrix.version }}
-        run:  |
-          sudo apt-get -qq update
-          sudo apt-get install -y clang-${{ matrix.version }}
+        run: sudo apt-get install -y clang-${{ matrix.version }}
 
       - name: Configure tests
         env:
           CXX: clang-${{ matrix.version }}
         run: cmake -S . -B build
-          -D CMAKE_CXX_COMPILER=clang++
+          -D CMAKE_CXX_COMPILER=clang++-${{ matrix.version }}
           -D CMAKE_BUILD_TYPE:STRING=Release
           -D ${{ env.PROJECT }}_OPT_SELECT_NONSTD=ON
           -D ${{ env.PROJECT }}_OPT_BUILD_TESTS=ON