Update version in constants.h

Author: Nir-Az

realsense2_camera/include/constants.h

@@ -19,7 +19,7 @@
 
 #define REALSENSE_ROS_MAJOR_VERSION    4
 #define REALSENSE_ROS_MINOR_VERSION    57
-#define REALSENSE_ROS_PATCH_VERSION    0
+#define REALSENSE_ROS_PATCH_VERSION    6
 
 #define STRINGIFY(arg) #arg
 #define VAR_ARG_STRING(arg) STRINGIFY(arg)