Geometry Nodes: Rename transfer attribute geometry input

Conceptually, this is the geometry that data is taken from,
not the target of an operation, so rename it from "Target"
to "Source". This was common user feedback and agreed
on in a recent sub-module meeting.

source/blender/blenloader/intern/versioning_300.c

@@ -2544,11 +2544,12 @@ void blo_do_versions_300(FileData *fd, Library *UNUSED(lib), Main *bmain)
       }
     }
 
-    /* Rename socket on "String to Curves"-node. */
+    /* Rename geometry socket on "String to Curves" node and "Transfer Attribute" node. */
     LISTBASE_FOREACH (bNodeTree *, ntree, &bmain->nodetrees) {
       if (ntree->type == NTREE_GEOMETRY) {
         version_node_output_socket_name(
             ntree, GEO_NODE_STRING_TO_CURVES, "Curves", "Curve Instances");
+        version_node_input_socket_name(ntree, GEO_NODE_TRANSFER_ATTRIBUTE, "Target", "Source");
       }
     }
   }