Fix ICP tutorial

[mpressig]

Replace in the proposed basic ICP web tuto the call to the function setInputCloud (deprecated) by setInputSource. ICP will fail with setInputCloud, and will succeed with setInputSource

[taketwo]

Would you mind to update line 65 in the running text?

pcl/doc/tutorials/content/iterative_closest_point.rst

Line 65 in 637ba7e

This creates an instance of an IterativeClosestPoint and gives it some useful information. "icp.setInputCloud(cloud_in);" sets cloud_in as the PointCloud to begin from and "icp.setInputTarget(cloud_out);" sets cloud_out as the PointCloud which we want cloud_in to look like.

[mpressig]

Ok, done

[taketwo]

Thanks