Patch tool_change typo

Marlin/src/module/tool_change.cpp

 
       // Unload / Retract
       #if ENABLED(TOOLCHANGE_FILAMENT_SWAP)
-        const bool should_swap = can_move_away && toolchange_settings.swap_length;
+        const bool should_swap = can_move_away && toolchange_settings.swap_length,
                    too_cold = TERN0(PREVENT_COLD_EXTRUSION,
                      !DEBUGGING(DRYRUN) && (thermalManager.targetTooColdToExtrude(old_tool) || thermalManager.targetTooColdToExtrude(new_tool))
                    );