Fix matrix build name

Author: 4c3y

.github/workflows/ubuntu20_04.yml

@@ -17,7 +17,7 @@ jobs:
         rosdistro: ['noetic']
         gcc: ['8', '9', '10']
     container: ros:${{ matrix.rosdistro }}-ros-base-focal
-    name: ROS ${{ matrix.rosdistro }} - GCC ${{ matrix.gcc }} - C++${{ matrix.cxx }}
+    name: ROS ${{ matrix.rosdistro }} - GCC ${{ matrix.gcc }}
     steps:
     - uses: actions/checkout@v4
       name: Checkout lpp