RealSense ROS1 wrapper version 2.2.21 now available

Hi everyone,

Version 2.2.21 of the RealSense ROS1 wrapper for Kinetic, Melodic and Noetic is now available for matching to librealsense SDK 2.41.0.

https://github.com/IntelRealSense/realsense-ros/releases/tag/2.2.21