Fix broken sentence

doc.zih.tu-dresden.de/docs/jobs_and_resources/barnard_test.md

 # How-To: Migration to Barnard
 
-All HPC users are invited to test our new HPC system Barnard and prepare your software
-and workflows for production there.
+All HPC users are cordially invited to migrate to our new HPC system **Barnard** and prepare your
+software and workflows for production there.
 
 **Furthermore, all data in the `/home` directory or in workspaces on the BeeGFS or Lustre SSD file
 systems will be deleted by the end of 2023!**
 
-Existing Taurus users that would like to keep some of their need to copy some of their data on these
-file systems need
-to copy them the new system manually, using the steps described below.
+Existing Taurus users that would like to keep some of their data need to copy them to the new system
+manually, using the steps described below.
 
 For general hints regarding the migration please refer to these sites: