Update price for /common

content/handling_data/data_storage/using_the_common_file_system.md

@@ -9,7 +9,7 @@ weight = 30
 -   Connected read/write to all HCC HPC cluster resources – you will see
     the same files "in common" on any HCC cluster (i.e. Crane and Rhino).
 -   30 TB Per-group quota at no charge – larger quota available for
-    $100/TB/year
+    $105/TB/year
 -   No backups are made!  Don't be silly!  Precious data should still be
     stored / backed up elsewhere such as on Attic.  Please. 
 -   No purge!  So, while your files just might be lost in the case of