Update package.xml to version 2.57.3

Author: Nir-Az

package.xml

@@ -6,7 +6,7 @@
 <package format="2">
   <name>librealsense2</name>
   <!-- The version tag needs to be updated with each new release of librealsense -->
-  <version>2.57.0</version>
+  <version>2.57.3</version>
   <description>
   Library for controlling and capturing data from the Intel(R) RealSense(TM) D400 devices.
   </description>