Fix

Author: Bill-hbrhbr

.github/workflows/unit-tests.yaml

@@ -46,7 +46,8 @@ jobs:
       - if: "matrix.os == 'ubuntu-20.04'"
         name: "Install gcc-10 (for c++20)"
         run: |-
-          apt-get update DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends -y \
+          sudo apt-get update
+          sudo DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends -y \
               g++-10 \
               gcc-10
           ln -s -f /usr/bin/gcc-10 /usr/bin/cc