Update Using pepcli - renaming _user pseudonym_ to _Participant Alias_ according to the Design Doc (1.55)

Using-pepcli.md

@@ -171,8 +171,8 @@ pepcli ama group removeFrom <participant group name> <participant>
 
 There are multiple ways to specify `<participant>`:
 - A PEP-id
-- A _local pseudonym_. This is the pseudonym that is used as directory name, when doing `pepcli pull`
-- A _user pseudonym_ . This is a shorter version, derived from _local pseudonym_
+- A _Local Pseudonym_. This is the pseudonym that is used as directory name, when doing `pepcli pull` (this will be replaced by the shorter _Participant Alias_ with the pep release planned in Februari or March 2023)
+- A _Participant Alias_ . This is a shorter version, derived from (cropping the) _Local Pseudonym_ . (formerly called _user pseudonym_)
 
 ### `ama query`