Updated bitstream read description in en.json5

(cherry picked from commit 2592f87)

src/assets/i18n/en.json5

@@ -1258,7 +1258,7 @@
 
   "comcol-role.edit.bitstream_read.name": "Default bitstream read access",
 
-  "comcol-role.edit.bitstream_read.description": "Community administrators can create sub-communities or collections, and manage or assign management for those sub-communities or collections. In addition, they decide who can submit items to any sub-collections, edit item metadata (after submission), and add (map) existing items from other collections (subject to authorization).",
+  "comcol-role.edit.bitstream_read.description": "E-People and Groups that can read new bitstreams submitted to this collection. Changes to this role are not retroactive. Existing bitstreams in the system will still be viewable by those who had read access at the time of their addition.",
 
   "comcol-role.edit.bitstream_read.anonymous-group": "Default read for incoming bitstreams is currently set to Anonymous.",