iwyu.yml: use Fedora as it contains the latest version

.github/workflows/iwyu.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     container:
-      image: "archlinux:latest"
+      image: "fedora:latest"
 
     steps:
       - uses: actions/checkout@v3
@@ -45,6 +45,11 @@ jobs:
           pacman -S include-what-you-use --noconfirm
           ln -s iwyu-tool /usr/sbin/iwyu_tool
 
+      - name: Install missing software on archlinux
+        if: contains(container.image, 'fedora')
+        run: |
+          yum install iwyu
+
       - name: Prepare CMake
         run: |
           cmake -S . -B cmake.output -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Release -DHAVE_RULES=On -DBUILD_TESTS=On -DBUILD_GUI=On -DWITH_QCHART=On -DENABLE_CHECK_INTERNAL=On -DCMAKE_GLOBAL_AUTOGEN_TARGET=On -DCMAKE_DISABLE_PRECOMPILE_HEADERS=On -DCPPCHK_GLIBCXX_DEBUG=Off -DUSE_MATCHCOMPILER=Off