feat: adjust gnu-linux-create-user.md

doc/gnu-linux-create-user.md

@@ -1,14 +1,14 @@
 # Create User
 
-* create user <usr> with default home folder\
+* create user <usr> with default home folder
 ```
 sudo useradd -m -s /usr/bin/bash <usr>
 ```
-* create password\
+* create password
 ```
 sudo passwd <usr>
 ```
-* add user <usr> to sudo group\
+* add user <usr> to sudo group
 ```
 sudo usermod -a -G sudo <usr>
 ```