Misc: Use [[fallthrough]] attribute instead of comment to mark intentional fallthroughs

src/common/Logging/AppenderConsole.cpp

@@ -185,7 +185,7 @@ void AppenderConsole::_write(LogMessage const* message)
                index = 0;
                break;
             case LOG_LEVEL_ERROR:
-                /* fallthrough */
+                [[fallthrough]];
             default:
                 index = 1;
                 break;