Conditionally build SWIG on Ubuntu 24.04 runners

.github/workflows/ci.yml

@@ -70,14 +70,22 @@ jobs:
         path: .deps/kdl
 
     - name: Check out SWIG
+      if: ${{matrix.os == 'ubuntu-24.04'}}
       uses: actions/checkout@v4
       with:
         repository: swig/swig
         ref: v4.2.1
         path: .deps/swig
 
     - name: Install dependencies via apt
-      run: sudo apt-get install -qq ccache libeigen3-dev bison googletest && sudo apt-get remove -y -qq swig
+      if: ${{matrix.os != 'ubuntu-24.04'}}
+      run: sudo apt-get install -qq ccache libeigen3-dev swig googletest
+
+    - name: Install dependencies via apt (Ubuntu-24.04-specific)
+      if: ${{matrix.os == 'ubuntu-24.04'}}
+      run: |
+        sudo apt-get install -qq ccache libeigen3-dev bison googletest
+        sudo apt-get remove -y -qq swig
 
     - name: Set up CMake
       uses: jwlawson/actions-setup-cmake@v2
@@ -113,6 +121,7 @@ jobs:
         sudo cmake --install .deps/kdl/orocos_kdl/build
 
     - name: Build SWIG
+      if: ${{matrix.os == 'ubuntu-24.04'}}
       run: |
         cmake -S .deps/swig -B .deps/swig/build $CMAKE_CCACHE_LAUNCHER
         cmake --build .deps/swig/build