updated GitHub workflow so examples read from /dev/null

Signed-off-by: Konstantin Läufer <[email protected]>

.github/workflows/cmake.yml

@@ -40,5 +40,5 @@ jobs:
       run: >
         for exe in bin/*; do
            echo "Running ./$exe"
-           "./$exe"
+           "./$exe" < /dev/null
         done