Update build_and_test.yml

.github/workflows/build_and_test.yml

@@ -31,7 +31,7 @@ jobs:
     - uses: actions/checkout@v2
     - name: Install boost
       run: sudo apt update && sudo apt install -yq libboost-all-dev
-    - name: Install Qt5
+    - name: Install Qt6
       run: sudo apt update && sudo apt install -yq build-essential libgl1-mesa-dev qt6-base-dev
     - name: Install CMake
       run: sudo apt update && sudo apt install -yq cmake