fix warning in CI about using apt in a script

.github/workflows/ci.yml

@@ -180,7 +180,7 @@ jobs:
           version=`yq -ptoml -oj -r '.package[] | select(.name == "iai-callgrind") | .version' Cargo.lock`
           echo installing iai-callgrind "$version"
           cargo install iai-callgrind-runner --force --version "$version"
-          sudo apt install valgrind -y
+          sudo apt-get install valgrind -y
 
       - name: Test and report
         run: |