github-CI: make installation quiet by default

Author: hcmh

.github/workflows/c-cpp.yml

@@ -14,7 +14,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: update
-      run: sudo apt-get install gcc make libfftw3-dev liblapacke-dev libpng-dev libopenblas-dev gfortran
+      run: sudo apt-get install -q gcc make libfftw3-dev liblapacke-dev libpng-dev libopenblas-dev gfortran
     - name: make all
       run: make all
     - name: make utest
@@ -23,5 +23,5 @@ jobs:
       run: make test
     - name: make pythontest
       run: |
-        sudo apt install python3 python3-numpy
+        sudo apt-get install -q python3 python3-numpy
         make pythontest