cd: page update (#7875)

* Refresh cd page:

- group examples
- add new example with ~user
- refresh grammar

* Fix syntax error

* Use "username" instead of "user_name"

Co-authored-by: CleanMachine1 <78213164+CleanMachine1@users.noreply.github.com>

Co-authored-by: CleanMachine1 <78213164+CleanMachine1@users.noreply.github.com>

pages/common/cd.md

@@ -3,18 +3,22 @@
 > Change the current working directory.
 > More information: <https://manned.org/cd>.
 
-- Go to the given directory:
+- Go to the specified directory:
 
 `cd {{path/to/directory}}`
 
-- Go to the home directory of the current user:
-
-`cd`
-
 - Go up to the parent of the current directory:
 
 `cd ..`
 
+- Go to the home directory of the current user:
+
+`cd`
+
+- Go to the home directory of the specified user:
+
+`cd ~{{username}}`
+
 - Go to the previously chosen directory:
 
 `cd -`